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Moždiak O, Tydlitát J, Růžičková Z, Dostál L, Jambor R. Ruthenium Complexes with N-Bound 2-Pyridonato Ligand as O-Donors: A New Synthetic Approach and the Effect on Reactivity. Chempluschem 2024; 89:e202300525. [PMID: 37916533 DOI: 10.1002/cplu.202300525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/31/2023] [Accepted: 11/02/2023] [Indexed: 11/03/2023]
Abstract
In this study, Ru complexes [(η6-p-cymene)RuX(2-{(2,6-iPr2-C6H3)N=CH}-C5H3N-6-(O))] (3: X=Cl; 4: X=I) were prepared with N-bound 2-pyridonato ligand by thermal base-free MeX elimination from ionic N,N-chelated Ru complexes [(η6-p-cymene)RuX(κ2-L1)](X) (1: X=Cl; 2: X=I; L1={2-[(2,6-iPr2-C6H3)N=CH]-6-(OMe)C5H3N}). The Ru complex 3 was used as O-donor for Lewis (LA) or Brönsted acids. The reactions of 3 with SnCl2, Ph3SnCl, ZnCl2 or HCl provided [(η6-p-cymene)Ru(SnCl3)(2-{(2,6-iPr2-C6H3)N=CH}-C5H3N-6-(O→SnCl2)] (6), [(η6-p-cymene)RuCl(2-{(2,6-iPr2-C6H3)N=CH}-C5H3N-6-(O→SnPh3Cl)] (7), and [(η6-p-cymene)RuCl(2-{(2,6-iPr2-C6H3)N=CH}-C5H3N-6-(O→)]2(μ-ZnCl2) (8) and [(η6-p-cymene)RuCl(2-{(2,6-iPr2-C6H3)N=CH}-C5H3N-6-(OH)}](Cl) (9). The easy conversion of the 2-pyridonato ligand in 3 to its 2-hydroxypyridine in 9 evoked testing of 3 and 4 as potential catalysts in base-free transfer-hydrogenation of ketones.
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Affiliation(s)
- Ondřej Moždiak
- Department of General and Inorganic Chemistry, University of Pardubice, 532 10, Pardubice, Czech Republic
| | - Jiří Tydlitát
- Institute of Organic Chemistry and Technology, University of Pardubice, 532 10, Pardubice, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, University of Pardubice, 532 10, Pardubice, Czech Republic
| | - Libor Dostál
- Department of General and Inorganic Chemistry, University of Pardubice, 532 10, Pardubice, Czech Republic
| | - Roman Jambor
- Department of General and Inorganic Chemistry, University of Pardubice, 532 10, Pardubice, Czech Republic
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2
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Vrána J, Růžičková Z, Růžička A, Dostál L. Synthesis and reactivity of alkali metal aluminates bearing bis(organoamido)phosphane ligand. Dalton Trans 2023; 52:12623-12631. [PMID: 37610275 DOI: 10.1039/d3dt01859h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
In this study, we report a group of alkali metal aluminates bearing bis(organoamido)phosphane ligand. The starting complex {[PhP(NtBu)2]AlMe2}Li·OEt2 (1) was prepared by stepwise deprotonation of the parent PhP(NHtBu)2 by nBuLi and AlMe3. Further derivatization of aluminate 1 was performed by the virtual substitution of lithium -{[PhP(NtBu)2]AlMe2}K (2), methyl substituents - {[PhP(NtBu)2]AlH2}Li·THF (3), modification of steric bulk and induction effects on the phosphorus atom - {[tBuP(N-2,6-iPr2C6H3)2]AlMe2}Li·(OEt2)2 (4), and phosphorus atom oxidation state {[Ph(Y)P(NtBu)2]AlMe2}Li (Y = O (5), S (6), Se (7), Te (8)). The structure causing non-covalent interactions in 1-4 were evaluated with the help of theoretical calculations and topological analysis ranging from π-electron system-metal to agostic interactions of various types. The further reactions of 1 with various nucleophiles were found to be a versatile tool for the preparation of iminophosphonamides via the formation of P-E bond (E = Si, Ge, Sn, Pb, P, and C) and followed by P(III) → P(V) tautomeric shift.
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Affiliation(s)
- Jan Vrána
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic.
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic.
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic.
| | - Libor Dostál
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic.
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3
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Novák M, Turek J, Milasheuskaya Y, Syková M, Dostál L, Stalmans J, Růžičková Z, Jurkschat K, Jambor R. Tin(II) cations stabilized by non-symmetric N,N',O-chelating ligands: synthesis and stability. Dalton Trans 2023; 52:2749-2761. [PMID: 36749616 DOI: 10.1039/d2dt03563d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A series of novel non-symmetric neutral N,N',O-chelating ligands derived from the α-iminopyridine 2-(C(R1)N(C6H3-2,6-iPr2))-6-(R2R3PO)C5H3N (L1: R1 = H, R2 = R3 = Ph; L2: R1 = Me, R2 = R3 = Ph; L3: R1 = H; R2 = Ph, R3 = EtO; L4: R1 = Me, R2 = Ph, R3 = EtO; L5: R1 = H, R2 = R3 = iPrO; L6: R1 = Me, R2 = R3 = iPrO) were synthesized. Ligands L1-6 were reacted with SnCl2 and Sn(OTf)2 with the aim of studying the influence of different R2R3PO functional groups on the Lewis base mediated ionization of SnCl2 and Sn(OTf)2. While all ligands L1-6 provided the corresponding ionic tin(II) complexes [L1-6 → SnCl]+[SnCl3]- (1-6), only ligands L1, L4 and L6 were able to stabilize tin(II) dications [L1,4,6 → Sn(H2O)][OTf]2 (7-9). The auto-ionized compounds [L3-6 → SnCl]+[SnCl3]- possessing ethylphenyl phosphinate and diisopropylphosphite substituents undergo elimination of EtCl and iPrCl, respectively, yielding compounds 10-13. These can either be interpreted as neutral tin(II)phosphinate chloride (10, 11) and tin(II)phosphonate chloride (12, 13), respectively, containing Sn-O and Sn-Cl bonds, and a PO → SnCl2 interaction, or as zwitterionic compounds, where the positive charge of the central tin atom is compensated by an [OSnCl2]- anion. Finally, DFT studies were performed to better understand the steric and electronic properties of the ligands L1-6 as well as the nature of the bonds in the resulting products, with a particular focus on complexes 10-13.
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Affiliation(s)
- Miroslav Novák
- Institute of Chemistry and Technology of Macromolecular Materials, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210 Pardubice, Czech Republic.
| | - Jan Turek
- Eenheid Algemene Chemie (ALGC), Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium.
| | - Yaraslava Milasheuskaya
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210 Pardubice, Czech Republic
| | - Miriam Syková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210 Pardubice, Czech Republic
| | - Libor Dostál
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210 Pardubice, Czech Republic
| | - Jesse Stalmans
- Eenheid Algemene Chemie (ALGC), Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium.
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210 Pardubice, Czech Republic
| | - Klaus Jurkschat
- Fäkultat für Chemie und Chemische Biologie, Technische Universität Dortmund, 44221 Dortmund, Germany
| | - Roman Jambor
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210 Pardubice, Czech Republic
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Švec P, Vránová I, Růžičková Z, Samsonov MA, Dostál L, Růžička A. C, N-CHELATED ANTIMONY AND BISMUTH COMPLEXES; OXIDATION AND FLUORINATION. J Organomet Chem 2023. [DOI: 10.1016/j.jorganchem.2023.122644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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Aman M, Dostál L, Růžičková Z, Turek J, Jambor R. Sn,P-Peri-Substituted Naphthalene as a Ligand for Transition Metals. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michal Aman
- Department of General and Inorganic Chemistry, University of Pardubice, 532 10 Pardubice, Czech Republic
| | - Libor Dostál
- Department of General and Inorganic Chemistry, University of Pardubice, 532 10 Pardubice, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, University of Pardubice, 532 10 Pardubice, Czech Republic
| | - Jan Turek
- Eenheid Algemene Chemie (ALGC), Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Roman Jambor
- Department of General and Inorganic Chemistry, University of Pardubice, 532 10 Pardubice, Czech Republic
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Chlupatý T, Růžičková Z, Kampová H, Merna J, Růžička A. Lithium, Magnesium, and Zinc Centers N,N'-Chelated by an Amine-Amide Hybrid Ligand. Inorg Chem 2022; 61:9392-9404. [PMID: 35706334 DOI: 10.1021/acs.inorgchem.1c03850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The synthesis and structure of lithium, magnesium, and zinc complexes N,N'-chelated by a hybrid amine-amido ligand ([2-(Me2NCH2)C6H4NR]-, abbreviated as LNR, where R = H, SiMe3, or Bn) are reported. The reaction of the least sterically demanding LNH with various magnesium sources gives the hexameric imide [LNMg]6 (4) by the elimination of n-butane from LNHMgnBu (2) or by the reaction of LNHLi (1) with MeMgBr. [LNH]2Mg (3) is obtained through the addition of 0.5 equiv of nBu2Mg or Mg[N(SiMe3)2]2 to LNH2 and with 1 equiv of nBu2Mg reacting to 2. Both LNHMgN(SiMe3)2 (6) and isostructural LNHZnN(SiMe3)2 (16) have been prepared using two different approaches: monodeprotonation of LNH2 by Zn/Mg[N(SiMe3)2]2 in a 1:1 ratio or ligand substitution of 2 or LNHZnEt (12) by 0.5 equiv of Sn[N(SiMe3)2]2. The reactions of 2 or 3 with 1 provide the heterotrimetallic complex [LNH]4Li2Mg (5). Benzyl- or trimethylsilyl-substituted anilines [LN(SiMe3)H (7) and LN(Bn)H (8)] with 0.5 equiv of nBu2Mg allow the formation of homoleptic bis(amides) of the [LN(R)]2Mg type (10 and 11). Nevertheless, only the silylated secondary amine 7 is able to provide the heteroleptic n-butylmagnesium amide LN(SiMe3)MgnBu (9) upon reaction with an equimolar amount of nBu2Mg. Similarly, 12, [LNH]2Zn (13), LN(R)ZnEt (17 and 18), and [LN(R)]2Zn [R = SiMe3 (19) and Bn (20)] were prepared by the monodeprotonation of LNH2 or LN(R)H using Et2Zn in the corresponding stoichiometric ratio. LNHZnI was prepared by the nucleophilic substitution of an ethyl chain in 12 by molecular iodine. A heterometallic complex, [LNH]4Li2Zn (14), analogous to 5 was prepared from 12 or 13 with 1 or 2 equiv of 1, respectively.
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Affiliation(s)
- Tomáš Chlupatý
- Faculty of Chemical Technology, Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
| | - Zdeňka Růžičková
- Faculty of Chemical Technology, Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
| | - Hana Kampová
- Faculty of Chemical Technology, Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
| | - Jan Merna
- Faculty of Chemical Technology, Department of Polymers, University of Chemistry and Technology, Technická 5, CZ-166 28 Prague 6, Czech Republic
| | - Aleš Růžička
- Faculty of Chemical Technology, Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
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7
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El Anwar S, Pazderová L, Bavol D, Bakardjiev M, Růžičková Z, Horáček O, Fojt L, Kučera R, Grűner B. Structurally rigidified cobalt bis(dicarbollide) derivatives, a chiral platform for labelling of biomolecules and new materials. Chem Commun (Camb) 2022; 58:2572-2575. [PMID: 35107456 DOI: 10.1039/d1cc06979a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We report the difunctional modification of an anionic cobalta bis(dicarbollide)(1-) cluster with a B(8,8')-oxygen bridging unit that provides structural rigidity and an organic alkylazide substituent(s) on the carbon atoms of the metallacarborane cage. These ions present a good binding motif for incorporation into organic molecules using Huisgen-Sharpless (2+3) cycloaddition reactions. In addition, the compounds are chiral, as verified by separation of enantiomers using HPLC on chiral stationary phases (CSPs) and provide a high electrochemical peak in the window located outside of typical signals of biomolecules.
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Affiliation(s)
- Suzan El Anwar
- Institute of Inorganic Chemistry, Czech Academy of Sciences, 25068 Řež, Czech Republic.
| | - Lucia Pazderová
- Institute of Inorganic Chemistry, Czech Academy of Sciences, 25068 Řež, Czech Republic.
| | - Dmytro Bavol
- Institute of Inorganic Chemistry, Czech Academy of Sciences, 25068 Řež, Czech Republic.
| | - Mário Bakardjiev
- Institute of Inorganic Chemistry, Czech Academy of Sciences, 25068 Řež, Czech Republic.
| | - Zdeňka Růžičková
- Dpt. of Inorganic and General Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 532 10 Pardubice, Czech Republic
| | - Ondřej Horáček
- Faculty of Pharmacy, Charles University, Akademika Heyrovskeho 1203, 500 05 Hradec Kráové, Czech Republic
| | - Lukáš Fojt
- Institute of Biophysics, Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic
| | - Radim Kučera
- Faculty of Pharmacy, Charles University, Akademika Heyrovskeho 1203, 500 05 Hradec Kráové, Czech Republic
| | - Bohumír Grűner
- Institute of Inorganic Chemistry, Czech Academy of Sciences, 25068 Řež, Czech Republic.
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8
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Chlupatý T, Brichová K, Samsonov MA, Růžičková Z, Růžička A. Reversible addition of tin(II) amides to nitriles. Dalton Trans 2022; 51:1879-1887. [PMID: 35018907 DOI: 10.1039/d1dt04060j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lappert's stannylene (Sn[N(SiMe3)2]2) has been reacted with various nitriles, dinitriles and trinitriles with the formation of heteroleptic amidotin(II) amidinates of the general formulae [RC(NSiMe3)2]SnN(SiMe3)2, R'{[C(NSiMe3)2]SnN(SiMe3)2}2 and R''{[C(NSiMe3)2]SnN(SiMe3)2}3, where R = Ph (1), 2-(CN)-C6H4 (2), 3-(CN)-C6H4 (3); R' = 1,3-C6H4 (4), 1,4-C6H4 (5) and R'' = 1,3,5-C6H3 (6). The reactions of amidotin(II) benzamidinate 1 with an excess of benzonitrile proceed to homoleptic tin(II) bis(benzamidinate) [PhC(NSiMe3)2]2Sn, which reversibly eliminates benzonitrile and 1 when warmed. The premise of reversibility has been supported by a multinuclear time-dependent NMR study and a theoretical (DFT) description. On the other hand, magnesium(II) bis(benzamidinate) [PhC(NSiMe3)2]2Mg (8) and lanthanum(II) tris(benzamidinate) [PhC(NSiMe3)2]3La (7) have been synthesised from appropriate metal hexamethyldisilazides and benzonitrile.
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Affiliation(s)
- Tomáš Chlupatý
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10, Pardubice, Czech Republic.
| | - Kristýna Brichová
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10, Pardubice, Czech Republic.
| | - Maksim A Samsonov
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10, Pardubice, Czech Republic.
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10, Pardubice, Czech Republic.
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10, Pardubice, Czech Republic.
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9
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Novák M, Turek J, Milasheuskaya Y, Růžičková Z, Podzimek Š, Jambor R. N-Donor stabilized tin(II) cations as efficient ROP catalysts for the synthesis of linear and star-shaped PLAs via the activated monomer mechanism. Dalton Trans 2021; 50:16039-16052. [PMID: 34651625 DOI: 10.1039/d1dt02658e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
α-Iminopyridine ligands L1 (2-(CHN(C6H2-2,4,6-Ph3))C5H4N), L2 (2-(CHN(C6H2-2,4,6-tBu3))C5H4N) and L3 (1,2-(C5H4N-2-CHN)2CH2CH2) differing by the steric demand of the substituent on the imine CHN group and by the number of donating nitrogen atoms were utilized to initiate a Lewis base mediated ionization of SnCl2 in an effort to prepare ionic tin(II) species [L1-3 → SnCl][SnCl3]. The reaction of L1 and L2 with SnCl2 led to the formation of neutral adducts [L1 → SnCl2] (2) and [L2 → SnCl2] (3). The preparation of the desired ionic compounds was achieved by subsequent reactions of 2 and 3 with an equivalent of SnCl2 or GaCl3. In contrast, ligand L3 containing four donor nitrogen atoms showed the ability to ionize SnCl2 and also Sn(OTf)2, yielding [L3 → SnCl][SnCl3] (7) and [L3 → Sn(H2O)][OTf]2 (8). The study thus revealed that the reaction is dependent on the type of the ligand. The prepared complexes 4-8 together with the previously reported [{2-((CH3)CN(C6H3-2,6-iPr2))-6-CH3O-C5H3N}SnCl][SnCl3] (1) were tested as catalysts for the ROP of L-lactide, which could operate via an activated monomer mechanism. Finally, a DFT computational study was performed to evaluate the steric and electronic properties of the ionic tin(II) species 1 and 4-8 together with their ability to interact with the L-lactide monomer.
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Affiliation(s)
- Miroslav Novák
- Institute of Chemistry and Technology of Macromolecular Materials, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210 Pardubice, Czech Republic.
| | - Jan Turek
- Eenheid Algemene Chemie (ALGC), Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium.
| | - Yaraslava Milasheuskaya
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210 Pardubice, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210 Pardubice, Czech Republic
| | - Štěpán Podzimek
- Institute of Chemistry and Technology of Macromolecular Materials, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210 Pardubice, Czech Republic. .,Synpo, Ltd., S.K. Neumanna 1316, 53207 Pardubice, Czech Republic
| | - Roman Jambor
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 53210 Pardubice, Czech Republic
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Bakardjiev M, Holub J, Růžičková Z, Růžička A, Fanfrlík J, Štíbr B, McKee ML, Hnyk D. Transformation of various multicenter bondings within bicapped-square antiprismatic motifs: Z-rearrangement. Dalton Trans 2021; 50:12098-12106. [PMID: 33656022 DOI: 10.1039/d0dt04225k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reported herein are mutual rearrangements in the whole series of seven bicapped-square antiprismatic closo-C2B8H10 by means of high-quality computations that disprove the earlier postulated dsd (diamond-square-diamond) scheme for these isomerizations. The experimentally existing closo-1,2-C2B8H10 was able to be converted to 1,6-, and 1,10-isomers by pyrolysis, and the dsd (diamond-square-diamond) mechanism was offered as an explanation of these processes. However, these computations disprove the postulated dsd scheme for these isomerizations that take place in the ten-vertex closo series. Experimentally observed thermal rearrangements, both in the parent and substituted closo-1,2-C2B8H10, closo-1-CB9H10-, and closo-B10H102-, indirectly support these refined computations. All these processes are based on the new concept of the so-called Z-mechanism, being consistent with a transition state of a boat shape with an open hexagonal belt that results from the initial breakage of three bonds. Such bond breakings and the consequent bond formations bring to mind the shape of the letter Z. In effect, the pattern of multicenter bonding shifts from reactant through a transition state to product. The molecular rearrangements that are available experimentally favour either the axial or equatorial isomers, and this ratio depends on temperature and the type of cluster and its substitution.
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Affiliation(s)
- Mario Bakardjiev
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, CZ - 250 68, Husinec-Řež, Czech Republic.
| | - Josef Holub
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, CZ - 250 68, Husinec-Řež, Czech Republic.
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Jindřich Fanfrlík
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, CZ - 166 10, Prague 6, Czech Republic
| | - Bohumil Štíbr
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, CZ - 250 68, Husinec-Řež, Czech Republic.
| | - Michael L McKee
- Department of Chemistry and Biochemistry, Auburn University, Auburn, AL, 36849, USA.
| | - Drahomír Hnyk
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, CZ - 250 68, Husinec-Řež, Czech Republic.
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11
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Vrána J, Holub J, Samsonov MA, Růžičková Z, Cvačka J, McKee ML, Fanfrlík J, Hnyk D, Růžička A. Access to cationic polyhedral carboranes via dynamic cage surgery with N-heterocyclic carbenes. Nat Commun 2021; 12:4971. [PMID: 34404809 PMCID: PMC8371172 DOI: 10.1038/s41467-021-25277-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 08/02/2021] [Indexed: 12/03/2022] Open
Abstract
Polyhedral boranes and heteroboranes appear almost exclusively as neutral or anionic species, while the cationic ones are protonated at exoskeletal heteroatoms or they are instable. Here we report the reactivity of 10-vertex closo-dicarbadecaboranes with one or two equivalents of N-heterocyclic carbene to 10-vertex nido mono- and/or bis-carbene adducts, respectively. These complexes easily undergo a reaction with HCl to give cages of stable and water soluble 10-vertex nido-type cations with protonation in the form of a BHB bridge or 10-vertex closo-type cations containing one carbene ligand when originating from closo-1,10-dicarbadecaborane. The reaction of a 10-vertex nido mono-carbene adduct with phosphorus trichloride gives nido-11-vertex 2-phospha-7,8-dicarbaundecaborane, which undergoes an oxidation of the phosphorus atom to P = O, while the product of a bis-carbene adduct reaction is best described as a distorted C2B6H8 fragment bridged by the (BH)2PCl2+ moiety. In comparison to their neutral or anionic counterparts, examples of cationic boron clusters remain scarce. Here, the authors prepare a variety of cationic polyhedral boranes by reacting closo-10-vertex carboranes with N-heterocyclic carbenes; the resulting open-cage cationic nido- arachno- or closo- derivatives are water soluble, which may enable unprecedented applications.
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Affiliation(s)
- Jan Vrána
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic
| | - Josef Holub
- Institute of Inorganic Chemistry, Czech Academy of Sciences, Řež, Czech Republic
| | - Maksim A Samsonov
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic
| | - Josef Cvačka
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic
| | - Michael L McKee
- Department of Chemistry and Biochemistry, Auburn University, Auburn, AL, USA
| | - Jindřich Fanfrlík
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic
| | - Drahomír Hnyk
- Institute of Inorganic Chemistry, Czech Academy of Sciences, Řež, Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic.
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12
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Bakardjiev M, Holub J, Bavol D, Vrána J, Samsonov MA, Růžička A, Růžičková Z, Fanfrlík J, Hnyk D. Thiaborane Icosahedral Barrier Increased by the Functionalization of all Terminal Hydrogens in closo-1-SB 11H 11. Inorg Chem 2021; 60:8428-8431. [PMID: 34101456 DOI: 10.1021/acs.inorgchem.1c00796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The electrophilic substitution of icosahedral closo-1-SB11H11 with methyl iodide has resulted in two B-functionalized thiaboranes, 7,12-I2-2,3,4,5,6,8,9,10,11-(CH3)9-1-closo-SB11 and 7,8,12-I3-2,3,4,5,6,9,10,11-(CH3)8-closo-1-SB11, with the former being significantly predominant. These two icosahedral thiaboranes are the first cases of polysubstituted polyhedral boron clusters with another vertex that differs from B and C. Such polyfunctionalizations have increased the earlier observed thiaborane icosahedral barrier, not exhibiting any reactivity toward bases, unlike the parent thiaborane. The search for methylation pathways has revealed that the complete B11-methylation is impossible, like in the case of decaborane(14), where this seems to be a result of the positively charged upper parts of these two molecules.
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Affiliation(s)
- Mario Bakardjiev
- Institute of Inorganic Chemistry, Czech Academy of Sciences, 250 68 Husinec-Řež, Czech Republic
| | - Josef Holub
- Institute of Inorganic Chemistry, Czech Academy of Sciences, 250 68 Husinec-Řež, Czech Republic
| | - Dmytro Bavol
- Institute of Inorganic Chemistry, Czech Academy of Sciences, 250 68 Husinec-Řež, Czech Republic
| | - Jan Vrána
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Maksim A Samsonov
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Jindřich Fanfrlík
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Praha 6, Czech Republic
| | - Drahomír Hnyk
- Institute of Inorganic Chemistry, Czech Academy of Sciences, 250 68 Husinec-Řež, Czech Republic
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13
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Novák M, Jambor R, Růžičková Z, Podzimek Š. Unique reactivity of an α-ketiminopyridine ligand with metal–alkyls: Synthesis and ROP of ε-caprolactone. NEW J CHEM 2021. [DOI: 10.1039/d0nj05498d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of an α-ketimininopyridine ligand 2-((Me)CN(C6H3-2,6-iPr2))-6-(OMe)C5H3N (L1) with metal–alkyls, such as MeLi, Et2Zn, Me3Al and Me2AlCl, was studied.
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Affiliation(s)
- Miroslav Novák
- Institute of Chemistry and Technology of Macromolecular Materials
- Faculty of Chemical Technology
- University of Pardubice
- 53210 Pardubice
- Czech Republic
| | - Roman Jambor
- Department of General and Inorganic Chemistry
- Faculty of Chemical Technology
- University of Pardubice
- 53210 Pardubice
- Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry
- Faculty of Chemical Technology
- University of Pardubice
- 53210 Pardubice
- Czech Republic
| | - Štěpán Podzimek
- Institute of Chemistry and Technology of Macromolecular Materials
- Faculty of Chemical Technology
- University of Pardubice
- 53210 Pardubice
- Czech Republic
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14
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Grüner B, Kugler M, El Anwar S, Holub J, Nekvinda J, Bavol D, Růžičková Z, Pospíšilová K, Fábry M, Král V, Brynda J, Řezáčová P. Cobalt Bis(dicarbollide) Alkylsulfonamides: Potent and Highly Selective Inhibitors of Tumor Specific Carbonic Anhydrase IX. Chempluschem 2020; 86:351. [PMID: 33369232 DOI: 10.1002/cplu.202000717] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Invited for this month's cover is a collaboration from three institutes from the Czech Academy of Sciences: Institute of Inorganic Chemistry, Institute of Organic Chemistry and Biochemistry, and Institute of Molecular Genetics, and the University of Pardubice. The cover picture shows a family of potent and selective CA IX inhibitors that combines the structural motif of a bulky inorganic cobalt bis(dicarbollide) polyhedral ion with a propylsulfonamido anchor group. Read the full text of the article at 10.1002/cplu.202000574.
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Affiliation(s)
- Bohumír Grüner
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68, Řež, Czech Republic
| | - Michael Kugler
- Institute of Molecular Genetics of the Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague 4, Czech Republic.,Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10, Prague, Czech Republic
| | - Suzan El Anwar
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68, Řež, Czech Republic
| | - Josef Holub
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68, Řež, Czech Republic
| | - Jan Nekvinda
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68, Řež, Czech Republic
| | - Dmytro Bavol
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68, Řež, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic
| | - Klára Pospíšilová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10, Prague, Czech Republic
| | - Milan Fábry
- Institute of Molecular Genetics of the Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague 4, Czech Republic
| | - Vlastimil Král
- Institute of Molecular Genetics of the Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague 4, Czech Republic
| | - Jiří Brynda
- Institute of Molecular Genetics of the Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague 4, Czech Republic
| | - Pavlína Řezáčová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10, Prague, Czech Republic
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15
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Grüner B, Kugler M, El Anwar S, Holub J, Nekvinda J, Bavol D, Růžičková Z, Pospíšilová K, Fábry M, Král V, Brynda J, Řezáčová P. Front Cover: Cobalt Bis(dicarbollide) Alkylsulfonamides: Potent and Highly Selective Inhibitors of Tumor Specific Carbonic Anhydrase IX (3/2021). Chempluschem 2020. [DOI: 10.1002/cplu.202000723] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Bohumír Grüner
- Department of Synthesis Institute of Inorganic Chemistry of the Czech Academy of Sciences 250 68 Řež Czech Republic
| | - Michael Kugler
- Institute of Molecular Genetics of the Czech Academy of Sciences Vídeňská 1083 142 20 Prague 4 Czech Republic
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo nám. 2 166 10 Prague Czech Republic
| | - Suzan El Anwar
- Department of Synthesis Institute of Inorganic Chemistry of the Czech Academy of Sciences 250 68 Řež Czech Republic
| | - Josef Holub
- Department of Synthesis Institute of Inorganic Chemistry of the Czech Academy of Sciences 250 68 Řež Czech Republic
| | - Jan Nekvinda
- Department of Synthesis Institute of Inorganic Chemistry of the Czech Academy of Sciences 250 68 Řež Czech Republic
| | - Dmytro Bavol
- Department of Synthesis Institute of Inorganic Chemistry of the Czech Academy of Sciences 250 68 Řež Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice Studentská 573 532 10 Pardubice Czech Republic
| | - Klára Pospíšilová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo nám. 2 166 10 Prague Czech Republic
| | - Milan Fábry
- Institute of Molecular Genetics of the Czech Academy of Sciences Vídeňská 1083 142 20 Prague 4 Czech Republic
| | - Vlastimil Král
- Institute of Molecular Genetics of the Czech Academy of Sciences Vídeňská 1083 142 20 Prague 4 Czech Republic
| | - Jiří Brynda
- Institute of Molecular Genetics of the Czech Academy of Sciences Vídeňská 1083 142 20 Prague 4 Czech Republic
| | - Pavlína Řezáčová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo nám. 2 166 10 Prague Czech Republic
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16
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El Anwar S, Růžičková Z, Bavol D, Fojt L, Grüner B. Tetrazole Ring Substitution at Carbon and Boron Sites of the Cobalt Bis(dicarbollide) Ion Available via Dipolar Cycloadditions. Inorg Chem 2020; 59:17430-17442. [DOI: 10.1021/acs.inorgchem.0c02719] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Suzan El Anwar
- The Institute of Inorganic Chemistry of the Czech Academy of Sciences, Řež 25068, Czech Republic
| | - Zdeňka Růžičková
- The Department of General and Inorganic Chemistry, Faculty of Chemical Technology, Studentská 573, University of Pardubice, Pardubice 53210, Czech Republic
| | - Dmytro Bavol
- The Institute of Inorganic Chemistry of the Czech Academy of Sciences, Řež 25068, Czech Republic
| | - Lukáš Fojt
- The Institute of Biophysics of the Academy of Sciences of the Czech Republic, v.v.i., Královopolská 135, Brno 61265, Czech Republic
| | - Bohumír Grüner
- The Institute of Inorganic Chemistry of the Czech Academy of Sciences, Řež 25068, Czech Republic
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17
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Nekvinda J, Kugler M, Holub J, El Anwar S, Brynda J, Pospíšilová K, Růžičková Z, Řezáčová P, Grüner B. Direct Introduction of an Alkylsulfonamido Group on C‐sites of Isomeric Dicarba‐
closo
‐dodecaboranes: The Influence of Stereochemistry on Inhibitory Activity against the Cancer‐Associated Carbonic Anhydrase IX Isoenzyme. Chemistry 2020; 26:16541-16553. [DOI: 10.1002/chem.202002809] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/28/2020] [Indexed: 12/30/2022]
Affiliation(s)
- Jan Nekvinda
- Department of Synthesis Institute of Inorganic Chemistry of, the Czech Academy of Sciences 25068 Řež Czech Republic
| | - Michael Kugler
- Institute of Molecular Genetics Czech Academy of Sciences Vídeňská 1083 14220 Prague 4 Czech Republic
- Institute of Organic Chemistry and Biochemistry Czech Academy of, Sciences Flemingovo nám. 2 16610 Prague Czech Republic
| | - Josef Holub
- Department of Synthesis Institute of Inorganic Chemistry of, the Czech Academy of Sciences 25068 Řež Czech Republic
| | - Suzan El Anwar
- Department of Synthesis Institute of Inorganic Chemistry of, the Czech Academy of Sciences 25068 Řež Czech Republic
| | - Jiří Brynda
- Institute of Molecular Genetics Czech Academy of Sciences Vídeňská 1083 14220 Prague 4 Czech Republic
- Institute of Organic Chemistry and Biochemistry Czech Academy of, Sciences Flemingovo nám. 2 16610 Prague Czech Republic
| | - Klára Pospíšilová
- Institute of Organic Chemistry and Biochemistry Czech Academy of, Sciences Flemingovo nám. 2 16610 Prague Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice Studentská 573 53210 Pardubice Czech Republic
| | - Pavlína Řezáčová
- Institute of Molecular Genetics Czech Academy of Sciences Vídeňská 1083 14220 Prague 4 Czech Republic
- Institute of Organic Chemistry and Biochemistry Czech Academy of, Sciences Flemingovo nám. 2 16610 Prague Czech Republic
| | - Bohumír Grüner
- Department of Synthesis Institute of Inorganic Chemistry of, the Czech Academy of Sciences 25068 Řež Czech Republic
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18
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Grüner B, Kugler M, El Anwar S, Holub J, Nekvinda J, Bavol D, Růžičková Z, Pospíšilová K, Fábry M, Král V, Brynda J, Řezáčová P. Cobalt Bis(dicarbollide) Alkylsulfonamides: Potent and Highly Selective Inhibitors of Tumor Specific Carbonic Anhydrase IX. Chempluschem 2020; 86:352-363. [PMID: 32955786 DOI: 10.1002/cplu.202000574] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 08/26/2020] [Indexed: 11/05/2022]
Abstract
Carbonic anhydrase IX (CAIX) is an enzyme expressed on the surface of cells in hypoxic tumors. It plays a role in regulation of tumor pH and promotes thus tumor cell survival and occurrence of metastases. Here, derivatives of the cobalt bis(dicarbollide)(1-) anion are reported that are based on substitution at the carbon sites of the polyhedra by two alkylsulfonamide groups differing in the length of the aliphatic connector (from C1 to C4, n=1-4), which were prepared by cobalt insertion into the 7-sulfonamidoalkyl-7,8-dicarba-nido-undecaborate ions. Pure meso- and rac-diastereoisomeric forms were isolated. The series is complemented with monosubstituted species (n=2). Synthesis by a direct method furnished similar derivatives (n=2, 3), which are chlorinated at the B(8,8') boron sites. All compounds inhibited CAIX with subnanomolar inhibition constants and showed high selectivity for CAIX. The best inhibitory properties were observed for the compound with n= 3 and two substituents present in rac-arrangement with Ki =20 pM and a selectivity index of 668. X-ray crystallography was used to study interactions of these compounds with the active site of CAIX on the structural level.
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Affiliation(s)
- Bohumír Grüner
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68, Řež, Czech Republic
| | - Michael Kugler
- Institute of Molecular Genetics of the Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague 4, Czech Republic.,Institute of Organic Chemistry and, Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Suzan El Anwar
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68, Řež, Czech Republic
| | - Josef Holub
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68, Řež, Czech Republic
| | - Jan Nekvinda
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68, Řež, Czech Republic
| | - Dmytro Bavol
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68, Řež, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic
| | - Klára Pospíšilová
- Institute of Organic Chemistry and, Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Milan Fábry
- Institute of Molecular Genetics of the Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague 4, Czech Republic
| | - Vlastimil Král
- Institute of Molecular Genetics of the Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague 4, Czech Republic
| | - Jiří Brynda
- Institute of Molecular Genetics of the Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague 4, Czech Republic
| | - Pavlína Řezáčová
- Institute of Organic Chemistry and, Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic
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19
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Chlupatý T, Nevoralová J, Růžičková Z, Růžička A. Lithium and Dilithium Guanidinates, a Starter Kit for Metal Complexes Containing Various Mono- and Dianionic Ligands. Inorg Chem 2020; 59:10854-10865. [PMID: 32650639 DOI: 10.1021/acs.inorgchem.0c01362] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Comparative studies of the synthesis of lithium guanidinates via nucleophilic addition of lithium amides to carbodiimides were performed. Four combinations of small or sterically crowded carbodiimide and sterically crowded lithium amide or lithium amide containing an adjacent amino donor group give ten different types of complexes. In particular, 2,6-[(CH3)2CH]2C6H3NHLi (DipNHLi, 1) reacts with (CH3)2CHN═C═NCH(CH3)2 upon the formation of the dissymmetric dimeric complex 2 with four-coordinate Li atoms. In contrast, 1 with DipN═C═NDip gives the mononuclear lithium guanidinate 3 with two-coordinate lithium by κ1-guanidinate, solvent molecule, and additional interaction with a π-electron cloud of one of the Dip groups. Analogous reactions of 2-[(CH3)2NCH2]C6H4NHLi (7) yield complexes 8 and 9, where the adjacent amino donors are always coordinated. Further deprotonation of 2, 3, 8, and 9 leads to dilithium guanidinates(2-)-4, 5, 10, and 11, among which only 5, containing three Dip groups, is monomeric with contacts to two π-electron systems of Dip groups. The rest of the complexes are tetranuclear with different structural patterns. In the central parts of molecules, toward which the nitrogen atoms of the guanidinates are oriented, lithium atoms are usually pseudotetrahedral, but trigonal in peripheral parts. Adjacent solvent molecules, chelating amino groups, and π-electron systems of Dip groups are coordinated in order to complete coordination polyhedra. Complexes 4 and 5 deoligomerize in solution upon the formation of fluxional monomeric dilithium species. Conversely, 11 is a dimer in solution due to the strong donation of an amino group. The silylated lithium amide {2-[(CH3)2NCH2]C6H4}[(Si(CH3)3]NLi (12) reacts with both carbodiimides to give dinuclear 13 obtained from diisopropylcarbodiimide and monomeric 14 from the second carbodiimide. Complexes 13 and 14 structurally resemble 8 and 9, with the highest degree of the localization of π-electron density within the N3C guanidinate system, η3-contact to the Dip ring, and a lack of the solvent molecule in 14.
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Affiliation(s)
- Tomáš Chlupatý
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
| | - Jana Nevoralová
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
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20
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Holub J, Růžička A, Růžičková Z, Fanfrlík J, Hnyk D, Štíbr B. Electrophilic Methylation of Decaborane(14): Selective Synthesis of Tetramethylated and Heptamethylated Decaboranes and Their Conjugated Bases. Inorg Chem 2020; 59:10540-10547. [DOI: 10.1021/acs.inorgchem.0c00917] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Josef Holub
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 250 68, Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, Pardubice 532 10, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, Pardubice 532 10, Czech Republic
| | - Jindřich Fanfrlík
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, Praha 6 166 10, Czech Republic
| | - Drahomír Hnyk
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 250 68, Czech Republic
| | - Bohumil Štíbr
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 250 68, Czech Republic
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21
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Vícha J, Švec P, Růžičková Z, Samsonov MA, Bártová K, Růžička A, Straka M, Dračínský M. Front Cover: Experimental and Theoretical Evidence of Spin‐Orbit Heavy Atom on the Light Atom
1
H NMR Chemical Shifts Induced through H⋅⋅⋅I
−
Hydrogen Bond (Chem. Eur. J. 40/2020). Chemistry 2020. [DOI: 10.1002/chem.202002352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jan Vícha
- Institute of Organic Chemistry and Biochemistry, AS CR Flemingovo nám. 2 Prague 16610 Czech Republic
- Centre of Polymer SystemsTomas Bata University in Zlín Tomáše Bati 5678 Zlín 760 01 Czech Republic
| | - Petr Švec
- Department of General and Inorganic ChemistryUniversity of Pardubice Studentská 573 Pardubice 53210 Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic ChemistryUniversity of Pardubice Studentská 573 Pardubice 53210 Czech Republic
| | - Maksim A. Samsonov
- Department of General and Inorganic ChemistryUniversity of Pardubice Studentská 573 Pardubice 53210 Czech Republic
| | - Kateřina Bártová
- Institute of Organic Chemistry and Biochemistry, AS CR Flemingovo nám. 2 Prague 16610 Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic ChemistryUniversity of Pardubice Studentská 573 Pardubice 53210 Czech Republic
| | - Michal Straka
- Institute of Organic Chemistry and Biochemistry, AS CR Flemingovo nám. 2 Prague 16610 Czech Republic
| | - Martin Dračínský
- Institute of Organic Chemistry and Biochemistry, AS CR Flemingovo nám. 2 Prague 16610 Czech Republic
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22
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Vícha J, Švec P, Růžičková Z, Samsonov MA, Bártová K, Růžička A, Straka M, Dračínský M. Experimental and Theoretical Evidence of Spin‐Orbit Heavy Atom on the Light Atom
1
H NMR Chemical Shifts Induced through H⋅⋅⋅I
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Hydrogen Bond. Chemistry 2020; 26:8698-8702. [DOI: 10.1002/chem.202001532] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Indexed: 01/11/2023]
Affiliation(s)
- Jan Vícha
- Institute of Organic Chemistry and Biochemistry, AS CR Flemingovo nám. 2 Prague 16610 Czech Republic
- Centre of Polymer SystemsTomas Bata University in Zlín Tomáše Bati 5678 Zlín 760 01 Czech Republic
| | - Petr Švec
- Department of General and Inorganic ChemistryUniversity of Pardubice Studentská 573 Pardubice 53210 Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic ChemistryUniversity of Pardubice Studentská 573 Pardubice 53210 Czech Republic
| | - Maksim A. Samsonov
- Department of General and Inorganic ChemistryUniversity of Pardubice Studentská 573 Pardubice 53210 Czech Republic
| | - Kateřina Bártová
- Institute of Organic Chemistry and Biochemistry, AS CR Flemingovo nám. 2 Prague 16610 Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic ChemistryUniversity of Pardubice Studentská 573 Pardubice 53210 Czech Republic
| | - Michal Straka
- Institute of Organic Chemistry and Biochemistry, AS CR Flemingovo nám. 2 Prague 16610 Czech Republic
| | - Martin Dračínský
- Institute of Organic Chemistry and Biochemistry, AS CR Flemingovo nám. 2 Prague 16610 Czech Republic
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Vícha J, Švec P, Růžičková Z, Samsonov MA, Bártová K, Růžička A, Straka M, Dračínský M. Experimental and Theoretical Evidence of Spin-Orbit Heavy Atom on the Light Atom 1 H NMR Chemical Shifts Induced through H⋅⋅⋅I - Hydrogen Bond. Chemistry 2020; 26:8669. [PMID: 32530077 DOI: 10.1002/chem.202002353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Invited for the cover of this issue is the group of Michal Straka and Martin Dračínský (IOCB Prague, Czech Academy of Sciences). The image depicts a neutron star, which is used to represent the relativistic effects between a heavy element and a hydrogen atom reported in this work. Read the full text of the article at 10.1002/chem.202001532.
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Affiliation(s)
- Jan Vícha
- Institute of Organic Chemistry and Biochemistry, AS CR, Flemingovo nám. 2, Prague, 16610, Czech Republic.,Centre of Polymer Systems, Tomas Bata University in Zlín, Tomáše Bati 5678, Zlín, 760 01, Czech Republic
| | - Petr Švec
- Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, Pardubice, 53210, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, Pardubice, 53210, Czech Republic
| | - Maksim A Samsonov
- Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, Pardubice, 53210, Czech Republic
| | - Kateřina Bártová
- Institute of Organic Chemistry and Biochemistry, AS CR, Flemingovo nám. 2, Prague, 16610, Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, Pardubice, 53210, Czech Republic
| | - Michal Straka
- Institute of Organic Chemistry and Biochemistry, AS CR, Flemingovo nám. 2, Prague, 16610, Czech Republic
| | - Martin Dračínský
- Institute of Organic Chemistry and Biochemistry, AS CR, Flemingovo nám. 2, Prague, 16610, Czech Republic
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Monteiro S, Imramovský A, Pauk K, Růžičková Z, Carvalho C, Pavlík J. Synthesis of Alfaprostol Key Intermediate Ynol via Br/Mg Exchange. ORG PREP PROCED INT 2020. [DOI: 10.1080/00304948.2020.1716623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Sara Monteiro
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic
| | - Aleš Imramovský
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic
| | - Karel Pauk
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic
| | - Catarina Carvalho
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic
| | - Jan Pavlík
- Cayman Pharma Ltd, Neratovice, Czech Republic
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Bakardjiev M, El Anwar S, Bavol D, Růžičková Z, Grűner B. Focus on Chemistry of the 10-Dioxane- nido-7,8-dicarba-undecahydrido Undecaborate Zwitterion; Exceptionally Easy Abstraction of Hydrogen Bridge and Double-Action Pathways Observed in Ring Cleavage Reactions with OH - as Nucleophile. Molecules 2020; 25:molecules25040814. [PMID: 32069968 PMCID: PMC7070711 DOI: 10.3390/molecules25040814] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 02/08/2020] [Accepted: 02/11/2020] [Indexed: 12/25/2022] Open
Abstract
Ring cleavage of cyclic ether substituents attached to a boron cage via an oxonium oxygen atom are amongst the most versatile methods for conjoining boron closo-cages with organic functional groups. Here we focus on much less tackled chemistry of the 11-vertex zwitterionic compound [10-(O-(CH2-CH2)2O)-nido-7,8-C2B9H11] (1), which is the only known representative of cyclic ether substitution at nido-cages, and explore the scope for the use of this zwitterion 1 in reactions with various types of nucleophiles including bifunctional ones. Most of the nitrogen, oxygen, halogen, and sulphur nucleophiles studied react via nucleophilic substitution at the C1 atom of the dioxane ring, followed by its cleavage that produces six atom chain between the cage and the respective organic moiety. We also report the differences in reactivity of this nido-cage system with the simplest oxygen nucleophile, i.e., OH-. With compound 1, reaction proceeds in two possible directions, either via typical ring cleavage, or by replacement of the whole dioxane ring with -OH at higher temperatures. Furthermore, an easy deprotonation of the hydrogen bridge in 1 was observed that proceeds even in diluted aqueous KOH. We believe this knowledge can be further applied in the design of functional molecules, materials, and drugs.
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Affiliation(s)
- Mário Bakardjiev
- Institute of Inorganic Chemistry of Czech Academy of Sciences, 25068 Řež, Czech Republic; (M.B.); (S.E.A.); (D.B.)
| | - Suzan El Anwar
- Institute of Inorganic Chemistry of Czech Academy of Sciences, 25068 Řež, Czech Republic; (M.B.); (S.E.A.); (D.B.)
| | - Dmytro Bavol
- Institute of Inorganic Chemistry of Czech Academy of Sciences, 25068 Řež, Czech Republic; (M.B.); (S.E.A.); (D.B.)
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53210 Pardubice, Czech Republic;
| | - Bohumír Grűner
- Institute of Inorganic Chemistry of Czech Academy of Sciences, 25068 Řež, Czech Republic; (M.B.); (S.E.A.); (D.B.)
- Correspondence: ; Tel.: +420-31123-6942
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Holub J, Vrána J, Růžička A, Růžičková Z, Fanfrlík J, Hnyk D. Thiaboranes on Both Sides of the Icosahedral Barrier: Retaining and Breaking the Barrier with Carbon Functionalities. Chempluschem 2020; 84:822-827. [PMID: 31944001 DOI: 10.1002/cplu.201900115] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 05/16/2019] [Indexed: 11/08/2022]
Abstract
The concept of icosahedral barrier has been expanded from the chemistry of carbaboranes to the area of thiaboranes. Both representatives of this barrier, i. e., closo-1,2-C2 B10 H12 and closo-1-SB11 H11 , are similar in their electron distribution, which is dominated by positive charge in the midpoint of the C-C vector and on the sulfur atom with experimentally determined dipole moments of 4.50 D and 3.64 D, respectively. This is a driving force for their reactivity as exemplified by their reactions with different carbon functionalities. Icosahedral closo-1-SB11 H11 reacts both with an electron sextet containing carbon (in the form of N-heterocyclic carbenes), reported earlier, and with methyl iodide with an electron octet on the carbon. The latter reaction provides hexamethylated thiaborane on the basis of methylation so far unknown in this area of heteroborane chemistry. The computations of the heat of formation (ΔHf 298 ) make it possible to estimate the height of the barrier as well as to propose closo-thiaboranes beyond the barrier. Eleven and twelve vertex thiaboranes with nido electron count are known experimentally for breaking the barrier. These computations also suggest that the larger nido-thiaboranes are promising candidates for the corresponding experimental availability, i. e., the ΔHf 298 of a 13-vertex nido-thiaborane cluster has been computed to be more negative than that of the well-known nido-SB10 H11 - cluster (-6.7 and -5.6 kcal mol-1 per vertex, respectively).
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Affiliation(s)
- Josef Holub
- Institute of Inorganic Chemistry, of the Czech Academy of Sciences, 250 68, Husinec-Řež, Czech Republic
| | - Jan Vrána
- Department of General and Inorganic Chemistry Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic
| | - Jindřich Fanfrlík
- Institute of Organic Chemistry and Biochemistry, of the Czech Academy of Sciences, 166 10, Praha 6, Czech Republic
| | - Drahomír Hnyk
- Institute of Inorganic Chemistry, of the Czech Academy of Sciences, 250 68, Husinec-Řež, Czech Republic
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Halaška J, Lokaj J, Jomová K, Růžičková Z, Mazúr M, Moncol J. Formation of supramolecular hydrogen-bonding chains and networks from copper (II) halogenobenzoates with N-methylnicotinamide: Supramolecular isomerism. Polyhedron 2020. [DOI: 10.1016/j.poly.2019.114237] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Řičica T, Milasheuskaya Y, Růžičková Z, Němec P, Švanda P, Zmrhalová ZO, Jambor R, Bouška M. Synthesis and Application of Monomeric Chalcogenolates of 13 Group Elements. Chem Asian J 2019; 14:4229-4235. [PMID: 31589377 DOI: 10.1002/asia.201901085] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 10/04/2019] [Indexed: 11/12/2022]
Abstract
Utilization of the N,C,N-chelating ligand L (L={2,6-(Me2 NCH2 )2 C6 H3 }- ) in the chemistry of 13 group elements provided either N→In coordinated monomeric chalcogenides LIn(μ-E4 ) (E=S, Se) with unprecedented InE4 inorganic ring or monomeric chalcogenolates LM(EPh)2 (M=Ga, In). Complex LGa(SePh)2 was selected as the most suitable single source precursor (SSP) for the deposition of amorphous semiconducting GaSe thin films using spin coating method.
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Affiliation(s)
- Tomáš Řičica
- Department of General and Inorganic Chemistry, University of Pardubice, Studentská 95, 532 10, Pardubice, Czech Republic
| | - Yaraslava Milasheuskaya
- Department of General and Inorganic Chemistry, University of Pardubice, Studentská 95, 532 10, Pardubice, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, University of Pardubice, Studentská 95, 532 10, Pardubice, Czech Republic
| | - Petr Němec
- Department of Graphic Art and Photophysics, University of Pardubice, Studentská 95, 532 10, Pardubice, Czech Republic
| | - Pavel Švanda
- Department of Mechanics Materials and Machine Parts, University of Pardubice, Studentská 95, 532 10, Pardubice, Czech Republic
| | - Zuzana Olmrová Zmrhalová
- Center of Materials and Nanotechnologies, University of Pardubice, Studentská 95, 532 10, Pardubice, Czech Republic
| | - Roman Jambor
- Department of General and Inorganic Chemistry, University of Pardubice, Studentská 95, 532 10, Pardubice, Czech Republic
| | - Marek Bouška
- Department of Graphic Art and Photophysics, University of Pardubice, Studentská 95, 532 10, Pardubice, Czech Republic
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Affiliation(s)
- Zdeňka Růžičková
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice Studentská 573 53210 Pardubice Czech Republic
| | - Roman Jambor
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice Studentská 573 53210 Pardubice Czech Republic
| | - Miroslav Novák
- Institute of Chemistry and Technology of Macromolecular Materials Faculty of Chemical Technology University of Pardubice Studentská 573 53210 Pardubice Czech Republic
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Vrána J, Holub J, Růžičková Z, Fanfrlík J, Hnyk D, Růžička A. Investigation of Thiaborane closo- nido Conversion Pathways Promoted by N-Heterocyclic Carbenes. Inorg Chem 2019; 58:2471-2482. [PMID: 30729783 DOI: 10.1021/acs.inorgchem.8b03037] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The 12-X- closo-SB11H10 (X = H or I) thiaboranes react with one or two molar equivalents of various N-heterocyclic carbenes (NHCs) to give the deprotonated 12-vertex species of [12-X-SB11H9·NHC]-[NHC-H]+composition as kinetic products. The use of one molar equivalent of a sterically more hindered NHC reactant leads to the formation of 12-X-SB11H10·NHC adducts with a heavily distorted cage and the nido electron count. Further reaction of 12-I-SB11H10·NHC to deboronated 12-X-SB10H9·NHC proceeds in acetone to complete the closo- nido reaction pathway under the thermodynamic control. The structures of all compounds have been investigated by NMR spectroscopy and diffraction techniques. The results are supported by theoretical methods.
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Affiliation(s)
- Jan Vrána
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology , University of Pardubice , Studentská 573 , 532 10 Pardubice , Czech Republic
| | - Josef Holub
- Institute of Inorganic Chemistry , Czech Academy of Sciences , 250 68 Řež , Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology , University of Pardubice , Studentská 573 , 532 10 Pardubice , Czech Republic
| | - Jindřich Fanfrlík
- Institute of Organic Chemistry and Biochemistry , Czech Academy of Sciences , Flemingovo náměstí 542/2 , 166 10 Praha 6 , Czech Republic
| | - Drahomír Hnyk
- Institute of Inorganic Chemistry , Czech Academy of Sciences , 250 68 Řež , Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology , University of Pardubice , Studentská 573 , 532 10 Pardubice , Czech Republic
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Bakardjiev M, Růžička A, Růžičková Z, Tok OL, Holub J, Hnyk D, Fanfrlík J, Štíbr B. Synthesis of closo-1,2-H 2C 2B 8Me 8 and 1,2-H 2C 2B 8Me 7X (X = I and OTf) Dicarbaboranes and Their Rearrangement Reactions. Inorg Chem 2019; 58:2865-2871. [PMID: 30730720 DOI: 10.1021/acs.inorgchem.8b03550] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Methyl-camouflaged dicarbaboranes closo-1,2- and 1,10-H2C2B8Me8 have been prepared in high yields either from nido-5,6-H2C2B8H10 or closo-1,2-H2C2B8H8 via electrophilic methylation reactions and cluster-rearrangement methods. Prepared were also monosubstituted derivatives of general formulation closo-H2C2B8Me7-X (X = I or OTf). The permethylated compounds exhibit extreme air stability in comparison to unprotected counterparts as a consequence of rigid, egg-shaped hydrocarbon structures incorporating inner C2B8 carborane scaffolding. The structures of all compounds isolated were confirmed unambiguously by multinuclear (11B, 1H, 13C, and 19F) NMR measurements, supported by X-ray diffraction analyses and geometry optimization methods on several compounds.
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Affiliation(s)
- Mario Bakardjiev
- Institute of Inorganic Chemistry of the Czech Academy of Sciences , 250 68 Husinec-Řež , Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology , University of Pardubice , Studentská 573 , 532 10 Pardubice , Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology , University of Pardubice , Studentská 573 , 532 10 Pardubice , Czech Republic
| | - Oleg L Tok
- Institute of Inorganic Chemistry of the Czech Academy of Sciences , 250 68 Husinec-Řež , Czech Republic
| | - Josef Holub
- Institute of Inorganic Chemistry of the Czech Academy of Sciences , 250 68 Husinec-Řež , Czech Republic
| | - Drahomír Hnyk
- Institute of Inorganic Chemistry of the Czech Academy of Sciences , 250 68 Husinec-Řež , Czech Republic
| | - Jindřich Fanfrlík
- Institute of Organic Chemistry and Biochemisty , of the Czech Academy of Sciences , Flemingovo nám, 5 , Prague 6 , Czech Republic
| | - Bohumil Štíbr
- Institute of Inorganic Chemistry of the Czech Academy of Sciences , 250 68 Husinec-Řež , Czech Republic
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Křižan M, Vinklárek J, Erben M, Růžičková Z, Honzíček J. Iron(II) complex with modified bispidine ligand: Synthesis and catalytic alkyd drying. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.11.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bakardjiev M, Tok OL, Růžička A, Růžičková Z, Holub J, Hnyk D, Fanfrlík J, Štíbr B. Quantitative syntheses of permethylated closo-1,10-R 2C 2B 8Me 8 (R = H, Me) carboranes. Egg-shaped hydrocarbons on the Frontier between inorganic and organic chemistry. RSC Adv 2018; 8:38238-38244. [PMID: 35559069 PMCID: PMC9090134 DOI: 10.1039/c8ra06640j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 10/31/2018] [Indexed: 11/25/2022] Open
Abstract
Electrophilic methylation of the closo-1,10-R2C2B8H8 (1) (R = H or Me) dicarbaboranes at higher temperatures or thermal rearrangement of the 1,6-R2C2B8Me8 (3) compounds at 400-500 °C generated the B-permethylated derivatives closo-1,10-R2C2B8Me8 (2) in quantitative (>95%) yields. The compounds exhibit extreme air stability as a consequence of a rigid, egg shaped hydrocarbon structures incorporating inner 1,10-C2B8 carborane core.
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Affiliation(s)
- Mario Bakardjiev
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic Husinec-Řež 1001 Czech Republic
| | - Oleg L Tok
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic Husinec-Řež 1001 Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice Studentská 573 532 10 Pardubice Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice Studentská 573 532 10 Pardubice Czech Republic
| | - Josef Holub
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic Husinec-Řež 1001 Czech Republic
| | - Drahomír Hnyk
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic Husinec-Řež 1001 Czech Republic
| | - Jindřich Fanfrlík
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo nám. 2, 166 10 Prague 6 Czech Republic
| | - Bohumil Štíbr
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic Husinec-Řež 1001 Czech Republic
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Doušová H, Almonasy N, Mikysek T, Váňa J, Nepraš M, Frumarová B, Dvořák M, Růžičková Z, Šimůnek P. Synthesis, spectral and electrochemical properties of selected boron ketiminates with aminocoumarin fragment. Monatsh Chem 2018. [DOI: 10.1007/s00706-018-2262-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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El Anwar S, Holub J, Tok O, Jelínek T, Růžičková Z, Fojt L, Šolínová V, Kašička V, Grüner B. Synthesis and selected properties of nonahalogenated 2-ammonio-decaborate anions and their derivatives substituted at N-centre. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.02.050] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Affiliation(s)
- Tomáš Řičica
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice 53210 Pardubice Czech Republic
| | - Libor Dostál
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice 53210 Pardubice Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice 53210 Pardubice Czech Republic
| | - Roman Jambor
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice 53210 Pardubice Czech Republic
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Švec P, Cattey H, Růžičková Z, Holub J, Růžička A, Plasseraud L. Triorganotin(iv) cation-promoted dimethyl carbonate synthesis from CO2and methanol: solution and solid-state characterization of an unexpected diorganotin(iv)-oxo cluster. NEW J CHEM 2018. [DOI: 10.1039/c7nj05058e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
NovelC,N-chelated organotin(iv) complexes bearing weakly coordinating carborane moieties were prepared and used as a catalyst precursor for the direct synthesis of dimethyl carbonate (DMC) from CO2and methanol.
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Affiliation(s)
- Petr Švec
- Department of General and Inorganic Chemistry
- Faculty of Chemical Technology
- University of Pardubice
- Pardubice
- Czech Republic
| | - Hélène Cattey
- Institut de Chimie Moléculaire de l’Université de Bourgogne (ICMUB)
- UMR CNRS 6302
- UFR Sciences et Techniques
- F-21078 Dijon Cedex
- France
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry
- Faculty of Chemical Technology
- University of Pardubice
- Pardubice
- Czech Republic
| | - Josef Holub
- Institute of Inorganic Chemistry
- Czech Academy of Sciences
- Řež
- Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry
- Faculty of Chemical Technology
- University of Pardubice
- Pardubice
- Czech Republic
| | - Laurent Plasseraud
- Institut de Chimie Moléculaire de l’Université de Bourgogne (ICMUB)
- UMR CNRS 6302
- UFR Sciences et Techniques
- F-21078 Dijon Cedex
- France
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Holub J, Růžičková Z, Hobza P, Fanfrlík J, Hnyk D, Růžička A. Various types of non-covalent interactions contributing towards crystal packing of halogenated diphospha-dicarbaborane with an open pentagonal belt. NEW J CHEM 2018. [DOI: 10.1039/c8nj00450a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have synthesized and crystalized 3-Cl-10-I-nido-7,8,9,11-P2C2B7H7. Quantum chemical calculations have demonstrated that the obtained crystal structure is stabilized by hydrogen, dihydrogen and pnictogen bonds.
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Affiliation(s)
- Josef Holub
- Institute of Inorganic Chemistry of the Czech Academy of Sciences
- 250 68 Husinec-Řež
- Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry
- Faculty of Chemical Technology
- University of Pardubice
- 53210 Pardubice
- Czech Republic
| | - Pavel Hobza
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences
- 166 10 Prague 6
- Czech Republic
| | - Jindřich Fanfrlík
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences
- 166 10 Prague 6
- Czech Republic
| | - Drahomír Hnyk
- Institute of Inorganic Chemistry of the Czech Academy of Sciences
- 250 68 Husinec-Řež
- Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry
- Faculty of Chemical Technology
- University of Pardubice
- 53210 Pardubice
- Czech Republic
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41
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Novotný M, Švec P, Růžičková Z, Růžička A. Direct access to non-symmetric lithium nitriloamidinate and disymmetric dilithium bisamidinate complexes from 1,3- or 1,4- dicyanobenzene and lithium amides. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.09.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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42
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Holub J, Melichar P, Růžičková Z, Vrána J, Wann DA, Fanfrlík J, Hnyk D, Růžička A. A novel stibacarbaborane cluster with adjacent antimony atoms exhibiting unique pnictogen bond formation that dominates its crystal packing. Dalton Trans 2017; 46:13714-13719. [PMID: 28956033 DOI: 10.1039/c7dt02845h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have prepared nido-7,8,9,11-Sb2C2B7H9, the first cluster with simultaneous Sb-B, Sb-C and Sb-Sb atom pairs with interatomic separations with magnitudes that approach the respective sums of covalent radii. However, the length of the Sb-Sb separation in this cluster is slightly less than the sum of the covalent radii. Quantum chemical analysis has revealed that the crystal packing of nido-7,8,9,11-Sb2C2B7H9 is predominantly dictated by pnictogen (Pn) bonding, an unconventional σ-hole interaction. Indeed, the interaction energy of a very strong Sb2H-B Pn-bond in the nido-7,8,9,11-Sb2C2B7H9 dimer exceeds -6.0 kcal mol-1. This is a very large value and is comparable to the strengths of known Pn-bonds in Cl3Pnπ complexes (Pn = As, Sb).
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Affiliation(s)
- Josef Holub
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, v.v.i., 250 68 Husinec-Řež, Czech Republic.
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43
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Kořenková M, Kremláček V, Erben M, Jambor R, Růžičková Z, Dostál L. Reactions of N,C,N-chelated pnictinidenes with Rh(I) and Ir(I) complexes: Coordination vs. Transmetalation. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.02.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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44
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Švec P, Leinweber P, Erben M, Růžičková Z, Růžička A. Employing a C,N-chelate makes organotin(IV) nitrates and nitrites exceptionally stable. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.03.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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45
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Tremmel J, Dostál L, Erben M, Růžičková Z, Turek J, De Proft F, Jambor R. Monomeric
C
,
N
‐Chelated Germanium Hydrides in N–C Bond Cleavage. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700355] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jakub Tremmel
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice 53210 Pardubice Czech Republic
| | - Libor Dostál
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice 53210 Pardubice Czech Republic
| | - Milan Erben
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice 53210 Pardubice Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice 53210 Pardubice Czech Republic
| | - Jan Turek
- Eenheid Algemene Chemie (ALGC) Member of the QCMM VUB‐UGent Alliance Research Group Vrije Universiteit Brussel Pleinlaan 2 1050 Brussels Belgium
| | - Frank De Proft
- Eenheid Algemene Chemie (ALGC) Member of the QCMM VUB‐UGent Alliance Research Group Vrije Universiteit Brussel Pleinlaan 2 1050 Brussels Belgium
| | - Roman Jambor
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice 53210 Pardubice Czech Republic
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46
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Puchoňová M, Mazúr M, Moncol J, Růžičková Z, Valigura D. Dimeric and different polymeric copper(II) salicylates – Crystal structure and spectral properties. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.02.081] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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47
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Klikar M, Jelínková V, Růžičková Z, Mikysek T, Pytela O, Ludwig M, Bureš F. Malonic Acid Derivatives on Duty as Electron-Withdrawing Units in Push-Pull Molecules. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700070] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Milan Klikar
- Institute of Organic Chemistry and Technology; Faculty of Chemical Technology; University of Pardubice; Studentská 573 53210 Pardubice Czech Republic
| | - Veronika Jelínková
- Institute of Organic Chemistry and Technology; Faculty of Chemical Technology; University of Pardubice; Studentská 573 53210 Pardubice Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry; Faculty of Chemical Technology; University of Pardubice; Studentská 573 53210 Pardubice Czech Republic
| | - Tomáš Mikysek
- Department of Analytical Chemistry; Faculty of Chemical Technology; University of Pardubice; Studentská 573 53210 Pardubice Czech Republic
| | - Oldřich Pytela
- Institute of Organic Chemistry and Technology; Faculty of Chemical Technology; University of Pardubice; Studentská 573 53210 Pardubice Czech Republic
| | - Miroslav Ludwig
- Institute of Organic Chemistry and Technology; Faculty of Chemical Technology; University of Pardubice; Studentská 573 53210 Pardubice Czech Republic
| | - Filip Bureš
- Institute of Organic Chemistry and Technology; Faculty of Chemical Technology; University of Pardubice; Studentská 573 53210 Pardubice Czech Republic
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48
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Affiliation(s)
- Mario Bakardjiev
- Institute of Inorganic
Chemistry, Academy of Sciences of the Czech Republic, 250 68 Řež, Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical
Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical
Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Josef Holub
- Institute of Inorganic
Chemistry, Academy of Sciences of the Czech Republic, 250 68 Řež, Czech Republic
| | - Oleg L. Tok
- Institute of Inorganic
Chemistry, Academy of Sciences of the Czech Republic, 250 68 Řež, Czech Republic
| | - Bohumil Štíbr
- Institute of Inorganic
Chemistry, Academy of Sciences of the Czech Republic, 250 68 Řež, Czech Republic
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49
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Pejchalová M, Havelek R, Královec K, Růžičková Z, Pejchal V. Novel derivatives of substituted 6-fluorobenzothiazole diamides: synthesis, antifungal activity and cytotoxicity. Med Chem Res 2017. [DOI: 10.1007/s00044-017-1894-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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50
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Honzíčková I, Vinklárek J, Růžičková Z, Řezáčová M, Honzíček J. Modified cyclopentadienyl molybdenum compounds with enhanced cytotoxic activity towards MOLT‐4 leukaemia cells. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3759] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Iva Honzíčková
- Department of General and Inorganic Chemistry, Faculty of Chemical TechnologyUniversity of Pardubice Studentská 573 532 10 Pardubice Czech Republic
| | - Jaromír Vinklárek
- Department of General and Inorganic Chemistry, Faculty of Chemical TechnologyUniversity of Pardubice Studentská 573 532 10 Pardubice Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical TechnologyUniversity of Pardubice Studentská 573 532 10 Pardubice Czech Republic
| | - Martina Řezáčová
- Department of Medical Biochemistry, Faculty of Medicine in Hradec KrálovéCharles University in Prague Šimkova 870 500 01 Hradec Králové Czech Republic
| | - Jan Honzíček
- Institute of Chemistry and Technology of Macromolecular Materials, Faculty of Chemical TechnologyUniversity of Pardubice Studentská 573 532 10 Pardubice Czech Republic
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