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Straiton A, McMullin CL, Kociok- Köhn G, Lyall CL, Parish JD, Johnson AL. Lithium, Tin(II), and Zinc Amino-Boryloxy Complexes: Synthesis and Characterization. Inorg Chem 2023; 62:2576-2591. [PMID: 36708353 PMCID: PMC9930121 DOI: 10.1021/acs.inorgchem.2c03108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Indexed: 01/29/2023]
Abstract
Analogous to the ubiquitous alkoxide ligand, metal boroxide and boryloxy complexes are an underexplored class of hard anionic O- ligand. A new series of amine-stabilized Li, Sn(II), and Zn boryloxy complexes, comprising electron-rich tetrahedral boron centers have been synthesized and characterized. All complexes have been characterized by one-dimensional (1D), two-dimensional (2D), and DOSY NMR, which are consistent with the solid-state structures unambiguously determined via single-crystal X-ray diffraction. Electron-rich μ2- (Sn and Zn) and μ3- (Li) boryloxy binding modes are observed. Compounds 6-9 are the first complexes of this class, with the chelating bis- and tris-phenol ligands providing a scaffold that can be easily functionalized and provides access to the boronic acid pro-ligand, hence allowing facile direct synthesis of the resulting compounds. Computational quantum chemical studies suggest a significant enhancement of the π-donor ability of the amine-stabilized boryloxy ligand because of electron donation from the amine functionality into the p-orbital of the boron atom.
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Affiliation(s)
- Andrew
J. Straiton
- Department
of Chemistry, University of Bath, Claverton Down BA2 7AY, U.K.
| | - Claire L. McMullin
- Department
of Chemistry, University of Bath, Claverton Down BA2 7AY, U.K.
| | - Gabriele Kociok- Köhn
- Material
and Chemical Characterisation Facility, University of Bath, Claverton
Down BA2 7AY, U.K.
| | - Catherine L. Lyall
- Material
and Chemical Characterisation Facility, University of Bath, Claverton
Down BA2 7AY, U.K.
| | - James D. Parish
- Infineum
UK Ltd., Milton Hill Business and Technology Centre, Abingdon OX13 6BB, Oxfordshire, U.K.
| | - Andrew L. Johnson
- Department
of Chemistry, University of Bath, Claverton Down BA2 7AY, U.K.
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2
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Milasheuskaya Y, Schwarz J, Dostál L, Růžičková Z, Bouška M, Olmrová Zmrhalová Z, Syrový T, Jambor R. Synthesis and optical properties of N→Ga coordinated gallium boroxines. Dalton Trans 2021; 50:18164-18172. [PMID: 34859799 DOI: 10.1039/d1dt02975d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reactions of the N,C,N-chelated organogallium amide LGa(NEt2)2 (1), where L is {2,6-(Me2NCH2)2C6H3}-, with organoboronic acids RB(OH)2 yielded molecular gallium boroxines LGa(O3B2R2) (2: R = OH, 3: R = Ph, 4: R = 4-MeO-C6H4, 5: R = 4-CHO-C6H4, 6: R = Fc), neutral analogues of gallaborates. The molecular structures revealed the presence of a six-membered central GaB2O3 ring. The film forming properties of 5 allowed the deposition of transparent thin films by a spin coating method. The thicknesses, refractive index, energy of the optical gap (Eoptg), activation energy of surface electrical conductivity (Esa) and pre-exponential factor (σ0) of the thin layers of 5 were measured and they are close to those found for related oxygen glass. Finally, GBO 5 was also used as an additive to printing ink and a thin film of 5 was prepared by the gravure printing technique.
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Affiliation(s)
- Yaraslava Milasheuskaya
- Department of General and Inorganic Chemistry, University of Pardubice, 532 10 Pardubice, Czech Republic.
| | - Jiří Schwarz
- 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.
| | - Zdenka Růžičková
- Department of General and Inorganic Chemistry, University of Pardubice, 532 10 Pardubice, Czech Republic.
| | - Marek Bouška
- Department of Graphic Arts and Photophysics, Faculty of Chemical Technology, University of Pardubice, 532 10 Pardubice, Czech Republic
| | - Zuzana Olmrová Zmrhalová
- Center of Materials and Nanotechnologies, Faculty of Chemical Technology, University of Pardubice, 532 10 Pardubice, Czech Republic
| | - Tomáš Syrový
- Department of Graphic Arts and Photophysics, Faculty of Chemical Technology, 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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Sokolov VG, Koptseva TS, Moskalev MV, Baranov EV, Fedyushkin IL. Reactions of Acenaphthenediimine Aluminum Hydride with 1,3-Dicyclohexylcarbodiimide and 2,6-Di-tert-Butyl-4-Methylphenol. RUSS J COORD CHEM+ 2019. [DOI: 10.1134/s1070328419090070] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Arnold PL, Puig-Urrea L, Wells JAL, Yuan D, Cruickshank FL, Young RD. Applications of boroxide ligands in supporting small molecule activation by U(iii) and U(iv) complexes. Dalton Trans 2019; 48:4894-4905. [PMID: 30924481 DOI: 10.1039/c8dt05051a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The boroxide ligand [OBAr2]- (Ar = Mes, Trip) is shown to be able to support both UIII and UIV centres for the first time. The synthesis and structures of homoleptic and heteroleptic UIII and UIV complexes are reported. The UX3 complex with larger substituents, [U(OBTrip2)3]2, exhibits greater thermal stability compared to less encumbered [U(OBMes2)3]2 but reacts with a smaller range of the small molecules tested to date. Initial studies on their capacity to participate in small molecule chemistry show that dark purple [U(OBMes2)3]2 binds and/or reductively activates a variety of small molecules such as pyridine-oxide, triphenylphosphineoxide, sulfur, and dicyclohexylcarbodiimide. While [U(OBMes2)3]2 shows no reaction with CO or CO2, [U(OBTrip2)3]2 is oxidised by both, in the former case forming [U(OBTrip2)4], and in the latter case forming a small quantity of the structurally characterised μ-carbonate product [(μ-CO3){U(OBTrip2)3}2].
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Affiliation(s)
- Polly L Arnold
- EaStCHEM School of Chemistry, Joseph Black Building, The King's Buildings, The University of Edinburgh, Edinburgh, EH9 3FJ, UK
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5
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Liu Y, Li J, Ma X, Yang Z, Roesky HW. The chemistry of aluminum(I) with β-diketiminate ligands and pentamethylcyclopentadienyl-substituents: Synthesis, reactivity and applications. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.07.004] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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6
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Soluble aluminum hydrides function as catalysts in deprotonation, insertion, and activation reactions. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.03.017] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Bernabé-Pablo E, Jancik V, Martínez-Otero D, Barroso-Flores J, Moya-Cabrera M. Molecular Group 13 Metallaborates Derived from M–O–M Cleavage Promoted by BH 3. Inorg Chem 2017; 56:7890-7899. [DOI: 10.1021/acs.inorgchem.7b00634] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Erandi Bernabé-Pablo
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Carretera Toluca-Atlacomulco Km 14.5, Toluca, Estado de México 50200, México
| | - Vojtech Jancik
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Carretera Toluca-Atlacomulco Km 14.5, Toluca, Estado de México 50200, México
| | - Diego Martínez-Otero
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Carretera Toluca-Atlacomulco Km 14.5, Toluca, Estado de México 50200, México
| | - Joaquín Barroso-Flores
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Carretera Toluca-Atlacomulco Km 14.5, Toluca, Estado de México 50200, México
| | - Mónica Moya-Cabrera
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Carretera Toluca-Atlacomulco Km 14.5, Toluca, Estado de México 50200, México
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9
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Mairychová B, Kityk IV, Maciag A, Bureš F, Klikar M, Růžička A, Dostál L, Jambor R. N→Sn-Coordinated Stannaoxidoborates Containing a SnB4O6 Unit. Inorg Chem 2016; 55:1587-94. [PMID: 26828856 DOI: 10.1021/acs.inorgchem.5b02505] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report here the synthesis of new N→Sn-coordinated stannaoxidoborates H[LSnB4O6R4] {L = [2,6-(Me2NCH2)C6H3](-) and R = Ph (6), 4-Br-Ph (7), 3,5-(CF3)2-Ph (8), and 4-CHO-Ph (9)} containing a nonsymmetric SnB4O6 unit. Compounds 6-9 represent new derivatives of the pentaborates [B5O6R4](-) in which the central boron is substituted by a tin atom. Compounds 6-9 were characterized by means of elemental analysis, electrospray ionization mass spectrometry, and NMR spectroscopy and in the case of 6-8 also by single-crystal X-ray diffraction analysis. The structures of N→Sn-coordinated stannaoxidoborates 6-8 consist of a spirobicyclic arrangement, with two six-membered SnB2O3 rings at the tin atom providing the new stannaoxidoborate [LSnB4O6R4](-) motif, which is compensated for by the proton atom coordinated to the Me2N group of the ligand L. The linear and thermal properties of 6-9 were studied with the help of electronic absorption spectra and differential scanning calorimetry. In addition, the presence of the nonsymmetric stannaoxidoborate SnB4O6 unit in 6, 7, and 9 prompted us to investigate their second-order nonlinear-optical properties.
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Affiliation(s)
- Barbora Mairychová
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice , 53210 Pardubice, Czech Republic
| | - I V Kityk
- Faculty of Electrical Engineering, Czestochowa University of Technology , Armii Krajowej 17, Czestochowa 42201, Poland
| | - Artur Maciag
- Faculty of Electrical Engineering, Czestochowa University of Technology , Armii Krajowej 17, Czestochowa 42201, Poland
| | - Filip Bureš
- Department of Organic Chemistry, Faculty of Chemical Technology, University of Pardubice , 53210 Pardubice, Czech Republic
| | - Milan Klikar
- Department of Organic Chemistry, Faculty of Chemical Technology, University of Pardubice , 53210 Pardubice, Czech Republic
| | - Aleš Růžička
- 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
| | - Roman Jambor
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice , 53210 Pardubice, Czech Republic
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Ayoub NA, Browne AR, Anderson BL, Gray TG. Cyclometalated gold(iii) trioxadiborrin complexes: studies of the bonding and excited states. Dalton Trans 2016; 45:3820-30. [DOI: 10.1039/c5dt04732c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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11
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Dostál L, Jambor R, Růžička A, Jirásko R, Lyčka A, Beckmann J, Ketkov S. From Stiba- and Bismaheteroboroxines to N,C,N-Chelated Diorganoantimony(III) and Bismuth(III) Cations-An Unexpected Case of Aryl Group Migration. Inorg Chem 2015; 54:6010-9. [PMID: 26016827 DOI: 10.1021/acs.inorgchem.5b00893] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An unprecedented transfer of an aryl group from boron to Sb and Bi is observed in the reaction of heteroboroxines of general formula ArM[(OBR)2O] [where M = Sb, Bi; Ar = C6H3-2,6-(CH2NMe2)2; R = Ph, 4-CF3C6H4, 4-BrC6H4] with corresponding boronic acid RB(OH)2. Using this procedure, ion pairs [ArMR](+)[R4B5O6](-) were obtained [where M = Sb and R = Ph (4), 4-CF3C6H4 (5), 4-BrC6H4 (6); where M = Bi and R = Ph (7), 4-CF3C6H4 (8), 4-BrC6H4 (9)]. All compounds were characterized using elemental analysis, electrospray ionization mass spectrometry, and multinuclear NMR spectroscopy, and molecular structures of 4 and 7 were determined by single-crystal X-ray diffraction analysis. The central metal atoms in 4-9 were arylated by respective boronic acids, which represents, to the best of our knowledge, unprecedented reaction path in the chemistry of heavier group 15 elements. Investigation of the mechanism of this transformation indicated that Lewis pairs consisting of monomeric oxides ArMO and boroxine rings are probably key intermediates. In this regard, molecular structures of ArSbO[(4-CF3C6H4)3B3O3]·(4-CF3C6H4)B(OH)2 (10) and {ArSbO[(3,5-(CF3)2C6H3)3B3O3]} (13) were established by single-crystal X-ray diffraction analysis, and compound 13 was also fully characterized in solution by multinuclear NMR spectroscopy. The bonding in 13 was analyzed in detail by using density functional theory and natural bond order calculations and compared with known adduct ArSbOB(C6F5)3 (14) and hypothetical ArSbO monomer.
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Affiliation(s)
| | | | | | | | - Antonín Lyčka
- §Research Institute for Organic Syntheses, Rybitví 296, CZ 533 54 Pardubice, Czech Republic
| | - Jens Beckmann
- ∥Institut für Anorganische Chemie, Universität Bremen, Leobener Straße, 28359 Bremen, Germany
| | - Sergey Ketkov
- ⊥G.A.Razuvaev Institute of Organometallic Chemistry, RAS, 49 Tropinin Street, 603950 Nizhny Novgorod, Russian Federation.,#N.I. Lobachevsky Nizhny Novgorod State University, Gagarin Avenue 23, 603950 Nizhny Novgorod, Russian Federation
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12
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Kořenková M, Erben M, Jambor R, Růžička A, Dostál L. The reactivity of N,C,N-intramolecularly coordinated antimony(III) and bismuth(III) oxides with the sterically encumbered organoboronic acid 2,6-i-Pr2C6H3B(OH)2. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.09.032] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Kořenková M, Mairychová B, Jambor R, Růžičková Z, Dostál L. Opening of boroxines by N,C,N-chelated antimony(III), bismuth(III) and tin(IV) compounds. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2014.07.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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Kořenková M, Mairychová B, Růžička A, Jambor R, Dostál L. Synthesis of heteroboroxines with MB₂O₃ core (M = Sb, Bi, Sn)--an influence of the substitution of parent boronic acids. Dalton Trans 2014; 43:7096-108. [PMID: 24671260 DOI: 10.1039/c3dt53012d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and structure of stiba-, stanna- and bismaheteroboroxines of a general formula L(E)M[(OBR)2O] supported by a N,C,N-chelating ligand L [where L = C6H3-2,6-(CH2NMe2)2, M, E = Sb, lone pair or Sn, Ph or Bi, lone pair] is reported. The target compounds are prepared by straightforward one-step reactions between oxides (LMO)2 (M = Sb or Bi) or organotin(iv) carbonate L(Ph)Sn(CO3) with four or two molar equivalents of corresponding organoboronic acid. All compounds were characterized with the help of elemental analysis, multinuclear NMR spectroscopy and on several occasions the molecular structure was determined using single-crystal X-ray diffraction analysis. The influence of both the substitution of the parent organoboronic acid and the central atom used on the feasibility of the condensation reaction was addressed. Furthermore, several heteroboroxines containing nitrogen donor functionality (i.e. NH2, NMe2, CN or 4-pyridyl) included in the boronic acid residue were synthesized and characterized with the aim to prepare boroxine-based covalent frameworks (through intermolecular N→B interactions) containing metal atoms in their structures. Although no such intermolecular bonding was detected in solution of these compounds, it was shown that the organotin(iv) heteroboroxine substituted by 4-pyridyl group forms an infinite polymeric chains via N→B interactions in the solid state. This polymer collapsed back to monomeric units upon dissolution.
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Affiliation(s)
- Monika Kořenková
- 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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