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Pellerito C, Emanuele S, Giuliano M, Fiore T. Organotin(IV) complexes with epigenetic modulator ligands: New promising candidates in cancer therapy. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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2
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Wang H, Liu Y, Su C, Schulz CE, Fan Y, Bian Y, Li J. Perspectives on Ligand Properties of N-Heterocyclic Carbenes in Iron Porphyrin Complexes. Inorg Chem 2021; 61:847-856. [PMID: 34962794 DOI: 10.1021/acs.inorgchem.1c02444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
There has been considerable research interest in the ligand nature of N-heterocyclic carbenes (NHCs). In this work, two six-coordinate NHC iron porphyrin complexes [FeII(TTP)(1,3-Me2Imd)2] (TTP = tetratolylporphyrin, 1,3-Me2Imd = 1,3-dimethylimidazol-2-ylidene) and [FeIII(TDCPP)(1,3-Me2Imd)2]ClO4 (TDCPP = 5,10,15,20-tetrakis(2,6-dichlorophenyl)porphyrin) are reported. Single-crystal X-ray characterizations demonstrate that both complexes have strongly ruffled conformations and relatively perpendicular ligand orientations which are forced by the sterically bulky 1,3-Me2Imd NHC ligands. Multitemperature (4.2-300 K) and high magnetic field (0-9 T) Mössbauer and low-temperature (4.0 K) EPR spectroscopies definitely confirmed the low-spin states of [FeII(TTP)(1,3-Me2Imd)2] (S = 0) and [FeIII(TDCPP)(1,3-Me2Imd)2]ClO4 (S = 1/2). The similarity of 1,3-Me2Imd and imidazole, as well as the well-established correlations between the ligand nature and spectroscopic characteristics of [FeII,III(Porph)(L)2]0,+ (Porph: porphyrin; L: planar base ligand) species, allowed direct comparisons between the pair of ligands which revealed for the first time that NHC has a stronger π-acceptor ability than imidazoles, in addition to its very strong σ-donation.
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Affiliation(s)
- Haimang Wang
- College of Materials Science and Optoelectronic Technology & CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Yanqi Lake, Huairou District, Beijing 101408, China
| | - Yulong Liu
- College of Materials Science and Optoelectronic Technology & CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Yanqi Lake, Huairou District, Beijing 101408, China
| | - Chaorui Su
- Department of Chemistry, School of Chemistry and Biological Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, and Daxing Research Institute, University of Science and Technology Beijing, Beijing 100083, China
| | - Charles E Schulz
- Department of Physics, Knox College, Galesburg, Illinois 61401, United States
| | - Yingying Fan
- College of Materials Science and Optoelectronic Technology & CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Yanqi Lake, Huairou District, Beijing 101408, China
| | - Yongzhong Bian
- Department of Chemistry, School of Chemistry and Biological Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, and Daxing Research Institute, University of Science and Technology Beijing, Beijing 100083, China
| | - Jianfeng Li
- Department of Chemistry, School of Chemistry and Biological Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, and Daxing Research Institute, University of Science and Technology Beijing, Beijing 100083, China
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Wächtler E, Gericke R, Block T, Gerke B, Pöttgen R, Wagler J. Compounds of the types Pn(pyS) 3 ( Pn = P, As, Bi; pyS: pyridine-2-thiolate) and Sb(pyS)
x
Ph 3–x
( x = 3–1); molecular structures and electronic situations of the Pn atoms. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2021. [DOI: 10.1515/znb-2020-0171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Abstract
The compounds Pn(pyS)3 (Pn = P, As, Sb, Bi) were synthesized from the respective chloride (Pn = P, As, Sb) or nitrate (Bi), pyridine-2-thiol (pySH) and triethylamine (NEt3) as a supporting base in THF (P, Sb), CHCl3 (As) or methanol (Bi). Sb(pyS)3 was also obtained from the reaction of SbCl3 with LipyS (prepared in situ) in methanol. The compounds Sb(pyS)2Ph and Sb(pyS)Ph2 were prepared in a one-pot reaction starting from SbCl3 and SbPh3 (1:1 ratio). Upon Cl/pyS substitution, the resulting reaction mixture allows for a facile separation of the products in hot hexane. P(pyS)3 and As(pyS)3 crystallize isostructurally to the reported structure of Sb(pyS)3 with κ-S-bound pyS ligands. These crystal structures feature close Pn···Pn contacts which are most pronounced for the arsenic derivative. Bi(pyS)3 adopts a different molecular structure in the solid state, which features two chelating (κ
2-S,N-pyS) ligands and a κ-S-bound ligand. The presence of N→Bi interactions between the nitrogen atom of the κ-S-pyS ligand and the Bi atom of another molecule renders this structure a polymer chain along the crystallographic b axis with Bi⋅⋅⋅Bi van-der-Waals contacts. The structures of this set of Pn(pyS)3 compounds were also studied in solution using 1H NMR spectroscopy, revealing equivalent pyS ligands in discrete Pn(pyS)3 molecules. The molecular structure of Sb(pyS)Ph2 was optimized by quantum chemical methods, and a comparison with the structures reported for the other Sb/pyS/Ph combinations reveals Sb(pyS)2Ph to feature the strongest Sb···N interactions with the κ-S-pyS ligand. The results of 1H NMR spectroscopic investigations of the compounds Sb(pyS)
x
Ph3–x
(x = 3–0) suggest the Ph protons in ortho position to be incorporated into intramolecular C–H···S contacts for x = 2 and 1. Natural localized molecular orbital (NLMO) calculations were employed in order to gain insights into the electronic situations of the Pn atoms and Pn–R bonds (R = S, C), especially for the effects caused by formal substitution of Pn in the compounds Pn(pyS)3 and the ligand patterns in the compounds Sb(pyS)
x
Ph3–x
(x = 3–0). For the latter series of compounds, the electronic situation of the Sb atom was further studied by 121Sb Mössbauer spectroscopy, providing a correlation between the calculated electron density at Sb [ρ(0)] and the experimentally observed isomer shift δ. The missing link between group 15 and group 13 metal compounds of the type M(pyS)3, compound Al(pyS)3, was synthesized in this work. In the solid state (confirmed crystallographically), the mer isomer of this tris-chelate complex with distorted octahedral Al coordination sphere was found. This coordination mode was confirmed for the solution state (CDCl3) by 1H and 13C NMR spectroscopy at T = −40 °C.
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Affiliation(s)
- Erik Wächtler
- Institut für Anorganische Chemie, Technische Universität Bergakademie Freiberg , Leipziger Straße 29 , 09596 Freiberg , Germany
| | - Robert Gericke
- Institut für Anorganische Chemie, Technische Universität Bergakademie Freiberg , Leipziger Straße 29 , 09596 Freiberg , Germany
- School of Chemistry, Trinity College Dublin , 152–160 Pearse Street , Dublin 2 , Ireland
| | - Theresa Block
- Institut für Anorganische und Analytische Chemie, Universität Münster , Corrensstraße 30 , 48149 Münster , Germany
| | - Birgit Gerke
- Institut für Anorganische und Analytische Chemie, Universität Münster , Corrensstraße 30 , 48149 Münster , Germany
| | - Rainer Pöttgen
- Institut für Anorganische und Analytische Chemie, Universität Münster , Corrensstraße 30 , 48149 Münster , Germany
| | - Jörg Wagler
- Institut für Anorganische Chemie, Technische Universität Bergakademie Freiberg , Leipziger Straße 29 , 09596 Freiberg , Germany
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Wächtler E, Gericke R, Block T, Pöttgen R, Wagler J. Trivalent Antimony as L-, X-, and Z-Type Ligand: The Full Set of Possible Coordination Modes in Pt-Sb Bonds. Inorg Chem 2020; 59:15541-15552. [PMID: 33030338 DOI: 10.1021/acs.inorgchem.0c02615] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In the course of our investigations of the coordination chemistry of trivalent antimony (Sb) compounds, we studied heteronuclear complexes formed in reactions of the compounds RSb(pyS)2 (R = pyS, Ph; pyS- = pyridine-2-thiolate) with [Pt(PPh3)4], i.e., complexes [(R)Sb(μ-pyS)2Pt(PPh3)] (R = pyS, 1; R = Ph, 2). The reaction of 1 with o-chloranil proceeds cleanly with elimination of 2,2'-dipyridyl disulfide and formation of the salt [(PPh3)Pt(μ-pyS)2Sb(μ-pyS)2Pt(PPh3)]+[Sb(C6Cl4O2)2]- (3III), which features the cation 3+. The charge-neutral, unsymmetrically substituted compound [(PPh3)Pt(μ-pyS)2Sb(μ-pyS)2Pt(κS-pyS)] (4) can be accessed by the reaction of 3+ with LipyS. The oxidation of 2 with o-chloranil furnishes the complex [(κ-O,O-C6Cl4O2)PhSb(μ-pyS)2Pt(PPh3)] (5). The oxidation of 1 with PhICl2 afforded the paddlewheel-shaped complex [Sb(μ-pyS)4PtCl] (6). Moreover, compound 6 was obtained by the reaction of Sb(pyS)3 with [PtCl(pyS)(PPh3)]. The polarization of Pt-Sb bonds of compounds 1-6 was investigated by natural localized molecular orbital (NLMO) calculations, which suggest X-type ligand character (covalent Pt-Sb bonds) for 1 and 2, whereas the Sb ligand of 6 reflects Z-type character (dative Pt→Sb bonds). In 3+, 4, and 5, high contributions of the reverse, i.e., L-type (dative Pt←Sb bonds), were observed. In conjunction with the results of NLMO analyses, 121Sb Mössbauer spectroscopy proves that complexes 1-6 represent essentially trivalent Sb complexes with either a free lone pair (LP) at the Sb atom (1, 2, and 6) or LP character involved in L-type Pt←Sb coordination (3+, 4, and 5).
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Affiliation(s)
- Erik Wächtler
- Institut für Anorganische Chemie, Technische Universität (TU) Bergakademie Freiberg, Leipziger Straße 29, 09599 Freiberg, Germany
| | - Robert Gericke
- Institut für Anorganische Chemie, Technische Universität (TU) Bergakademie Freiberg, Leipziger Straße 29, 09599 Freiberg, Germany
| | - Theresa Block
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 30, 48149 Münster, Germany
| | - Rainer Pöttgen
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 30, 48149 Münster, Germany
| | - Jörg Wagler
- Institut für Anorganische Chemie, Technische Universität (TU) Bergakademie Freiberg, Leipziger Straße 29, 09599 Freiberg, Germany
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5
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Shahabadi N, Shiri F, Hadidi S. The effect of dimerization on the interaction of ibuprofen drug with calf thymus DNA: Molecularmodeling and spectroscopic investigation. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2018; 37:147-168. [PMID: 29465331 DOI: 10.1080/15257770.2018.1438617] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The interaction between the dimer structure of ibuprofen drug (D-IB) and calf thymus DNA under simulative physiological conditions was investigated with the use of Hoechst 33258 and methylene blue dye as spectral probes by the methods of UV-visible absorption, fluorescence spectroscopy, circular dichroism spectroscopy and molecular modeling study.Using the Job's plot, a single class of binding sites for theD-IB on DNA was put in evidence. The Stern-Volmer analysis of fluorescence quenching data shows the presence of both the static and dynamic quenching mechanisms. The binding constants, Kb were calculated at different temperatures, and the thermodynamic parameters ∆G∘, ∆H∘ and ∆S∘ were given. The experimental results showed that D-IB molecules could bind with DNA via groove binding mode as evidenced by: I. DNA binding constant from spectrophotometric studies of the interaction of D-IB with DNA is comparable to groove binding drugs. II. Competitive fluorimetric studies with Hoechst 33258 have shown that D-IB exhibits the ability of this complex to displace with DNA-bounded Hoechst, indicating that it binds to DNA in strong competition with Hoechst for the groove binding. III. There is no significantly change in the absorption of the MB-DNA system upon adding the D-IB, indicates that MB molecules are not released from the DNA helix after addition of the D-IB and are indicative of a non-intercalative mode of binding. IV. Small changes in DNA viscosity in the presence of D-IB, indicating weak link to DNA, which is consistent with DNA groove binding. As well as, induced CD spectral changes, and the docking results revealed that groove mechanism is followed by D-IB to bind with DNA.
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Affiliation(s)
- Nahid Shahabadi
- a Inorganic Chemistry Department, Faculty of Chemistry , Razi University , Kermanshah , Iran.,b Medical Biology Research Center (MBRC) Kermanshah University of Medical Sciences , Kermanshah , Iran
| | - Farshad Shiri
- a Inorganic Chemistry Department, Faculty of Chemistry , Razi University , Kermanshah , Iran
| | - Saba Hadidi
- a Inorganic Chemistry Department, Faculty of Chemistry , Razi University , Kermanshah , Iran.,b Medical Biology Research Center (MBRC) Kermanshah University of Medical Sciences , Kermanshah , Iran
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Carpenter SH, Neidig ML. A Physical-Inorganic Approach for the Elucidation of Active Iron Species and Mechanism in Iron-Catalyzed Cross-Coupling. Isr J Chem 2017; 57:1106-1116. [PMID: 29622838 DOI: 10.1002/ijch.201700036] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Detailed studies of iron speciation and mechanism in iron-catalyzed cross-coupling reactions are critical for providing the necessary fundamental insight to drive new reaction development. However, such insight is challenging to obtain due to the prevalence of mixtures of unstable, paramagnetic organoiron species that can form in this chemistry. A physical-inorganic research approach combining freeze-trapped inorganic spectroscopic studies, organometallic synthesis and GC/kinetic studies provides a powerful method for studying such systems. Mössbauer, EPR and MCD spectroscopy enable the direct investigation of in situ formed iron species and, combined with GC analysis, the direct correlation of reactions of specific iron species to the generation of organic products. This review focuses on a description of the key methods involved in this physical-inorganic approach, as well as examples of its application to investigations of iron-SciOPP catalyzed cross-coupling catalysis.
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Affiliation(s)
- Stephanie H Carpenter
- Department of Chemistry, University of Rochester, Rochester, New York 14627 (USA), Tel: 585-276-6006
| | - Michael L Neidig
- Department of Chemistry, University of Rochester, Rochester, New York 14627 (USA), Tel: 585-276-6006
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Wächtler E, Wahlicht S, Privér SH, Bennett MA, Gerke B, Pöttgen R, Brendler E, Gericke R, Wagler J, Bhargava SK. Tin(IV) Compounds with 2-C 6F 4PPh 2 Substituents and Their Reactivity toward Palladium(0): Formation of Tin-Palladium Complexes via Oxidative Addition. Inorg Chem 2017; 56:5316-5327. [PMID: 28406288 DOI: 10.1021/acs.inorgchem.7b00410] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The tin(IV) compounds MexSn(2-C6F4PPh2)4-x (1, x = 1; 2, x = 2) and ClSn(2-C6F4PPh2)3 (3) were obtained from the reactions of 2-LiC6F4PPh2 with MeSnCl3 (3:1), Me2SnCl2 (2:1), or SnCl4 (3:1), respectively. The reactions of 2-LiC6F4PPh2 with SnCl4 in different stoichiometric ratios (4:1-1:1) gave 3 as the main product. Compound Cl2Sn(2-C6F4PPh2)2 (4) was formed in the transmetalation reaction of 3 and [AuCl(tht)] but could not be isolated. 1 and 2 react with palladium(0) sources {[Pd(PPh3)4] and [Pd(allyl)Cp]} by the oxidative addition of one of their Sn-CAryl bonds to palladium(0) with formation of the heterobimetallic complexes [MeSn(μ-2-C6F4PPh2)2Pd(κC-2-C6F4PPh2)] (5) and [Me2Sn(μ-2-C6F4PPh2)Pd(κ2-2-C6F4PPh2)] (6) featuring Sn-Pd bonds. The reaction of 3 with palladium(0) proceeds via the oxidative addition of the Sn-Cl bond to palladium(0), thus furnishing the complex [Sn(μ-2-C6F4PPh2)3PdCl] (7) featuring a Sn-Pd bond and a pentacoordinate Pd atom. Transmetalation of MexSn(2-C6F4PPh2)4-x (x = 1-3) with [Pd(allyl)Cl]2 gave MexClSn(2-C6F4PPh2)3-x and [Pd(allyl)(μ-2-C6F4PPh2)]2. For x = 1, the compound MeClSn(2-C6F4PPh2)2 (generated in situ) reacted with another 1 equiv of [Pd(allyl)Cl]2 by the oxidative addition of the Sn-Cl bond to palladium(0) and the reductive elimination of allyl chloride, thus leading to [MeSn(μ-2-C6F4PPh2)2PdCl] (8). The reductive elimination of allyl chloride was also observed in the reaction of 3 with [Pd(allyl)Cl]2, giving [Sn(μ-2-C6F4PPh2)3PdCl] (7). All compounds have been characterized by means of multinuclear NMR spectroscopy, elemental analysis, single-crystal X-ray diffraction, and selected compounds by 119Sn Mössbauer spectroscopy. Computational analyses (natural localized molecular orbital calculations) have provided insight into the Sn-Pd bonding of 5-8.
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Affiliation(s)
- Erik Wächtler
- Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University , G.P.O. Box 2476, Melbourne, Victoria 3001, Australia
| | - Sven Wahlicht
- Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University , G.P.O. Box 2476, Melbourne, Victoria 3001, Australia
| | - Steven H Privér
- Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University , G.P.O. Box 2476, Melbourne, Victoria 3001, Australia
| | - Martin A Bennett
- Research School of Chemistry, Australian National University , Canberra, Australian Capital Territory 2601, Australia
| | - Birgit Gerke
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster , Corrensstrasse 30, 48149 Münster, Germany
| | - Rainer Pöttgen
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster , Corrensstrasse 30, 48149 Münster, Germany
| | | | | | | | - Suresh K Bhargava
- Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University , G.P.O. Box 2476, Melbourne, Victoria 3001, Australia
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8
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Wächtler E, Oro LA, Iglesias M, Gerke B, Pöttgen R, Gericke R, Wagler J. Synthesis and Oxidation of a Paddlewheel-Shaped Rhodium/Antimony Complex Featuring Pyridine-2-Thiolate Ligands. Chemistry 2017; 23:3447-3454. [PMID: 28083957 DOI: 10.1002/chem.201605485] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Indexed: 01/11/2023]
Abstract
The paddlewheel-shaped complex [Sb(μ-pyS)4 Rh]2 (1) (pyS- = 2-S-C5 H4 N- ) was synthesized from [Rh(pyS)(cod)]2 (cod=1,5-cyclooctadiene) and Sb(pyS)3 . Upon oxidation with ONMe3 , the complex [(μ-O)Sb(μ-pyS)3 Rh(κ2 -pyS)]2 (2) is formed. Both 1 and 2 form dimers and feature short Rh-Sb bonds and bridging pyS ligands. 121 Sb Mössbauer spectro- scopy and computational studies were employed to elucidate the Rh-Sb bonding in 1 and 2. Both covalent (Rh-Sb, X-type Sb ligand) and dative (Rh→Sb, Z-type; Rh←Sb L-type Sb ligand) interactions have to be considered for the description of their bonding situations.
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Affiliation(s)
- Erik Wächtler
- Institut für Anorganische Chemie, TU Bergakademie Freiberg, Leipziger Straße 29, 09596, Freiberg, Germany.,Departamento Química Inorgánica-ISQCH, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Luis A Oro
- Departamento Química Inorgánica-ISQCH, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Manuel Iglesias
- Departamento Química Inorgánica-ISQCH, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Birgit Gerke
- Institut für Anorganische und Analytische Chemie, WWU Münster, Corrensstraße 30, 48149, Münster, Germany
| | - Rainer Pöttgen
- Institut für Anorganische und Analytische Chemie, WWU Münster, Corrensstraße 30, 48149, Münster, Germany
| | - Robert Gericke
- Institut für Anorganische Chemie, TU Bergakademie Freiberg, Leipziger Straße 29, 09596, Freiberg, Germany
| | - Jörg Wagler
- Institut für Anorganische Chemie, TU Bergakademie Freiberg, Leipziger Straße 29, 09596, Freiberg, Germany
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Mirzadeh N, Bennett M, Wagler J, Wächtler E, Gerke B, Pöttgen R, Bhargava S. Dichotomy between Palladium(II)-Tin(II) and Palladium(0)-Tin(IV) in Complexes of a Sn,As-Based Chelate Ligand. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300115] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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10
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Chen F, Ma G, Bernard GM, Wasylishen RE, Cavell RG, McDonald R, Ferguson MJ. An Investigation of 1:1 Adducts of Gallium Trihalides with Triarylphosphines by Solid-State69/71Ga and31P NMR Spectroscopy. Chemistry 2013; 19:2826-38. [DOI: 10.1002/chem.201202954] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2012] [Indexed: 11/09/2022]
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11
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Shpakovsky DB, Banti CN, Beaulieu-Houle G, Kourkoumelis N, Manoli M, Manos MJ, Tasiopoulos AJ, Hadjikakou SK, Milaeva ER, Charalabopoulos K, Bakas T, Butler IS, Hadjiliadis N. Synthesis, structural characterization and in vitro inhibitory studies against human breast cancer of the bis-(2,6-di-tert-butylphenol)tin(iv) dichloride and its complexes. Dalton Trans 2012; 41:14568-82. [DOI: 10.1039/c2dt31527k] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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12
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Girasolo MA, Canfora L, Sabatino P, Schillaci D, Foresti E, Rubino S, Ruisi G, Stocco G. Synthesis, characterization, crystal structures and in vitro antistaphylococcal activity of organotin(IV) derivatives with 5,7-disubstituted-1,2,4-triazolo[1,5-a]pyrimidine. J Inorg Biochem 2011; 106:156-63. [PMID: 22119808 DOI: 10.1016/j.jinorgbio.2011.09.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Revised: 09/06/2011] [Accepted: 09/06/2011] [Indexed: 01/22/2023]
Abstract
New organotin(IV) complexes of 5,7-ditertbutyl-1,2,4-triazolo[1,5-a]pyrimidine (dbtp) and 5,7-diphenyl-1,2,4-triazolo[1,5-a]pyrimidine (dptp) with 1:1 and/or 1:2 stoichiometry were synthesized and investigated by X-ray diffraction, FT-IR and (119)Sn Mössbauer in the solid state and by (1)H and (13)C NMR spectroscopy, in solution. Moreover, the crystal and molecular structures of Et(2)SnCl(2)(dbtp)(2) and Ph(2)SnCl(2)(EtOH)(2)(dptp)(2) are reported. The complexes contain hexacoordinated tin atoms: in Et(2)SnCl(2)(dbtp)(2) two 5,7-ditertbutyl-1,2,4-triazolo[1,5-a]pyrimidine molecules coordinate classically the tin atom through N(3) atom and the coordination around the tin atom shows a skew trapezoidal structure with axial ethyl groups. In Ph(2)SnCl(2)(EtOH)(2)(dptp)(2) two ethanol molecules coordinate tin through the oxygen atom and the 5,7-diphenyl-1,2,4-triazolo[1,5-a]pyrimidine molecules are not directly bound to the metal center but strictly H-bonded, through N(3), to the OH group of the ethanol moieties; Ph(2)SnCl(2)(EtOH)(2)(dptp)(2) has an all-trans structure and the C-Sn-C fragment is linear. On the basis of Mössbauer data, the 1:2 diorganotin(IV) complexes are advanced to have the same structure of Et(2)SnCl(2)(dbtp)(2), while Me(2)SnCl(2)(dptp)(2) to have a regular all-trans octahedral structure. A distorted cis-R(2) trigonal bipyramidal structure is assigned to 1:1 diorganotin(IV) complexes. The in vitro antibacterial activities of the synthesized complexes have been tested against a group of reference pathogen micro-organisms and some of them resulted active with MIC values of 5μg/mL, most of all against staphylococcal strains, which shows their inhibitory effect.
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Pebler J, Schmidt K, Nadler HG, Dehnicke K. 121Sb-Mössbauer-Spektren sechsfach koordinierter Antimon(V)-Verbindungen. Z Anorg Allg Chem 2011. [DOI: 10.1002/zaac.654270209] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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14
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Carraher CE, Blum FD, Nair MB, Barot G, Battin A, Fiore T, Pellerito C, Scopelliti M, Zhao A, Roner MR, Pellerito L. Solid State Analysis of Metal-Containing Polymers Employing Mössbauer Spectroscopy, Solid State NMR and F EI TOF MALDI MS. J Inorg Organomet Polym Mater 2010. [DOI: 10.1007/s10904-010-9336-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Assunta Girasolo M, Rubino S, Portanova P, Calvaruso G, Ruisi G, Stocco G. New organotin(IV) complexes with l-Arginine, Nα-t-Boc-l-Arginine and l-Alanyl-l-Arginine: Synthesis, structural investigations and cytotoxic activity. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2009.11.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Synthesis and Characterization of Some Triphenyltin(IV) Complexes from Sterically Crowded [((E)-1-{2-Hydroxy-5-[(E)-2-(aryl)-1-diazenyl]phenyl}methylidene)amino]acetate Ligands and Crystal Structure Analysis of a Tetrameric Triphenyltin(IV) Compound. J Inorg Organomet Polym Mater 2010. [DOI: 10.1007/s10904-009-9322-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Synthesis and Structures of Two Triorganotin(IV) Polymers R3Sn{O2CC6H4[N=C(H)}{C(CH3)CH(CH3)-3-OH]-p} n (R = Me and Ph) Containing a 4-[(2Z)-(3-Hydroxy-1-methyl-2-butenylidene)amino] benzoic Acid Framework. J Inorg Organomet Polym Mater 2009. [DOI: 10.1007/s10904-009-9281-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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18
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Casella G, Fiore T, Foresti E, Mohamed MM, Nagy L, Pellerito C, Scopelliti M, Pellerito L. Structural investigations on diorganotin and triorganotin(IV) phosphomycin derivatives. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2006.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Self-assembly of extended Schiff base amino acetate skeletons, 2-{[(2Z)-(3-hydroxy-1-methyl-2-butenylidene)]amino}phenylpropionate and 2-{[(E)-1-(2-hydroxyaryl)alkylidene]amino}phenylpropionate skeletons incorporating organotin(IV) moieties: Synthesis, spectroscopic characterization, crystal structures, and in vitro cytotoxic activity. J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2007.06.061] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Mohan M, Manmohan. Transition Metal Chemistry of S,N-Containing Ligands, Part I. Pentacoordinate Mono-Ligand Complexes of Iron(II), Cobalt(II), Nickel(II) and Copper(II) with 1-Formylisoquinoline Thiosemicarbazone and 2-Formylquinoline Thiosemicarbazone. ACTA ACUST UNITED AC 2007. [DOI: 10.1080/00945718208082693] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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22
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McCarthy PJ, Bereman RD. THE SINGLE CRYSTAL POLARIZED OPTICAL SPECTRA OF HEXAAQUOIRON(II) PERCHLORATE. J COORD CHEM 2007. [DOI: 10.1080/00958977708079899] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Paul J. McCarthy
- a Department of Chemistry , Canisius College , Buffalo , New York , 14208 , U.S.A
| | - Robert D. Bereman
- b Department of Chemistry , State University of New York at Buffalo , Buffalo , New York , 14214 , U.S.A
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Basu Baul TS, Singh KS, Linden A, Song X, Eng G. Synthesis, spectroscopic characterization of tribenzyltin(IV) complexes of polyaromatic carboxylic acid ligands: Crystal and molecular structures of Bz3Sn[O2CC6H4{NN(C6H3-4-OH(C(H)NC6H4X-4))}-o](OH2) (X=–Cl, –OCH3). Polyhedron 2006. [DOI: 10.1016/j.poly.2006.06.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Szorcsik A, Nagy L, Scopelliti M, Pellerito L, Sipos P. Characterization of complexes formed between [Me2Sn(IV)]2+ and carboxymethylcelluloses. Carbohydr Res 2006; 341:2083-9. [PMID: 16764843 DOI: 10.1016/j.carres.2006.05.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2006] [Revised: 05/04/2006] [Accepted: 05/16/2006] [Indexed: 11/22/2022]
Abstract
Complexes formed between carboxymethylcellulose (CMC) and the [Me(2)Sn(IV)]2+ cation have been prepared in the solid state and characterized by FTIR and Mössbauer spectroscopy. The complexes contained CMC with varying molar weight and degree of carboxylation, and the complexes were isolated both from acidic and from neutral solutions at varying metal-to-ligand ratios. The characteristic vibration bands of the ligands were identified from their pH-dependent FTIR spectra. In the organotin(IV) complexes obtained at pH approximately 2, the -COO- moieties were found to be coordinated in a monodentate manner, and the band characteristic of the protonated (unbound) -COO- group(s) was also identified. The broad -OH band can be interpreted as the sum of the contributions of the alcoholic -OH groups of the anhydroglucose units and the mixed organotin aqua complexes. In complexes obtained at pH approximately 7, the broad -OH band significantly sharpens, which is probably due to the metal-ion induced deprotonation and subsequent coordination of the alcoholic -OH groups. At the same time, -COO- groups are also involved in the coordination of the metal ions, resulting in a complicated network that forms through inter- and intramolecular bridges. Quadrupole splitting (/Delta(exp)/) values observed by Mössbauer spectroscopy revealed that the valence state of tin is four in all of the complexes. The /Delta(exp)/ values were compared with the calculated ones, obtained from the pqs theory. From these data, trigonal bipyramidal (Tbp) and octahedral (Oh) geometries have been suggested for the complexes obtained. It has also been concluded that the structure of the complexes prepared depends mainly on the pH of the solution, and it is relatively insensitive to the other parameters, like molar mass or degree of carboxylation of the ligand, or the metal-to-ligand ratio in the reaction mixture.
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Affiliation(s)
- A Szorcsik
- Bio-inorganic Chemistry Research Group of Hungarian Academy of Sciences, Department of Inorganic and Analytical Chemistry, University of Szeged, PO Box 440, H-6701 Szeged, Hungary
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Hu C, An J, Noll BC, Schulz CE, Scheidt WR. Electronic configuration of high-spin imidazole-ligated iron(II) octaethylporphyrinates. Inorg Chem 2006; 45:4177-85. [PMID: 16676979 PMCID: PMC1525298 DOI: 10.1021/ic052194v] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The preparation and characterization of two new five-coordinate, imidazole-ligated, high-spin iron(II) octaethylporphyrinates is described. [Fe(OEP)(1,2-Me2Im)] and [Fe(OEP)(2-MeHIm)] have been characterized by X-ray structure determinations and temperature-dependent Mössbauer spectroscopy in zero and applied magnetic fields. The distinction between imidazole-ligated and other ligands in high-spin iron(II) porphyrinates, noted for a series of tetraarylporphyrinate derivatives (Hu, C.; Roth, A.; Ellison, M. K.; An, J.; Ellis, C. M.; Schiltz, C. E.; Scheidt, W. R. J. Am. Chem. Soc. 2005, 127, 5675), is seen here as well. The sign of the quadrupole-splitting constant is again negative, which is unique to the imidazole-ligated derivatives and suggests a distinct electronic structure. The derivatives again display a remarkable temperature dependence in the quadrupole splitting, which is also seen for deoxymyoglobin and -hemoglobin. Structural features for the two new derivatives are similar to those seen earlier, although the core conformations show somewhat more doming character.
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Affiliation(s)
- Chuanjiang Hu
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
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26
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Szorcsik A, Nagy L, Scopelliti M, Deák A, Pellerito L, Galbács G, Hered M. Preparation and structural characterization of [Ph3Sn(IV)]+ complexes with pyridine-carboxylic acids or hydroxypyridine, -pyrimidine and -quinoline. J Organomet Chem 2006. [DOI: 10.1016/j.jorganchem.2005.12.019] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Structural investigations on diorgano- and triorganotin(IV) derivatives of [meso-tetra(4-sulfonatophenyl)porphine] metal chlorides. J Organomet Chem 2006. [DOI: 10.1016/j.jorganchem.2005.12.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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Xanthopoulou MN, Hadjikakou SK, Hadjiliadis N, Kubicki M, Karkabounas S, Charalabopoulos K, Kourkoumelis N, Bakas T. Synthesis and characterization of a new chloro-di-phenyltin(IV) complex with 2-mercapto-nicotinic acid: Study of its influence upon the catalytic oxidation of linoleic acid to hydroperoxylinoleic acid by the enzyme lipoxygenase. J Organomet Chem 2006. [DOI: 10.1016/j.jorganchem.2005.11.073] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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29
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Girasolo MA, Schillaci D, Di Salvo C, Barone G, Silvestri A, Ruisi G. Synthesis, spectroscopic characterization and in vitro antimicrobial activity of diorganotin(IV) dichloride adducts with [1,2,4]triazolo-[1,5-a]pyrimidine and 5,7-dimethyl-[1,2,4]triazolo-[1,5-a]pyrimidine. J Organomet Chem 2006. [DOI: 10.1016/j.jorganchem.2005.10.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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30
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Basu Baul TS, Singh KS, Lyčka A, Linden A, Song X, Zapata A, Eng G. Synthesis, characterization and crystal structures of triorganotin(IV) complexes of 4-[(E)-2-(3-formyl-4- hydroxyphenyl)-1-diazenyl]- and 4-{(E)-4-hydroxy-3-[(E)-4-(aryl)iminomethyl]phenyldiazenyl}-benzoic acids and toxicity studies of their tri-n-butyltin(IV) derivatives on theAedes aegypti andAnopheles stephensi mosquito larvae. Appl Organomet Chem 2006. [DOI: 10.1002/aoc.1127] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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31
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Cardiano P, Giuffrè O, Pellerito L, Pettignano A, Sammartano S, Scopelliti M. Thermodynamic and spectroscopic study of the binding of dimethyltin(IV) by citrate at 25 °C. Appl Organomet Chem 2006. [DOI: 10.1002/aoc.1076] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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32
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Girasolo MA, Di Salvo C, Schillaci D, Barone G, Silvestri A, Ruisi G. Synthesis, characterization, and in vitro antimicrobial activity of organotin(IV) complexes with triazolo-pyrimidine ligands containing exocyclic oxygen atoms. J Organomet Chem 2005. [DOI: 10.1016/j.jorganchem.2005.07.072] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Barone G, Silvestri A, Ruisi G, La Manna G. DFT Calculations of the Electric Field Gradient at the Tin Nucleus as a Support of Structural Interpretation by119Sn Mössbauer Spectroscopy. Chemistry 2005; 11:6185-91. [PMID: 16052634 DOI: 10.1002/chem.200401156] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
DFT calculations, using an all-electron basis set and with full geometry optimization, were performed on 34 Sn(II) and Sn(IV) compounds of known structure and (119)Sn Mössbauer parameters, to obtain the theoretical values of the electric field gradient components, V(xx), V(yy), and V(zz), at the tin nucleus. These were used to determine the quantity V = V(zz)[1+ 1/3((V(xx) - V(yy))/((V(zz))(2)](1/2), for each investigated compound, which is related to the quadrupole splitting (DeltaE) parameter according to DeltaE = 1/2eQV, where e is the electronic charge and Q is the quadrupole moment of the tin nucleus. The linear fitting of the correlation plot of the experimental DeltaE, versus the corresponding calculated V values, produced a slope that is equal to 0.93 +/- 0.03 and a correlation coefficient R = 0.982. The value of Q obtained, 15.2 +/- 4.4 fm(2), is in agreement with that previously experimentally determined or calculated by analogous procedures. The calculation method is able to establish the sign of the electric field gradient component V(zz), in agreement with the sign of DeltaE determined experimentally by Mössbauer-Zeeman spectroscopy. The calculated structural parameters are in good agreement with the corresponding experimental data, determined by X-ray crystallography in the solid state, with average structural deviations of about 3 % for bond lengths and angles in the tin environment. Calculated values of DeltaE were obtained from the calibration fitting constant and from the values of V. By comparing experimental and calculated DeltaE parameters, the structure assignment of configurational isomers was successful in two test cases, in agreement with the experimental X-ray crystallographic structures. These results indicate that the method can be used as a tool to support the routine structure interpretation of tin compounds by (119)Sn Mössbauer spectroscopy.
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Affiliation(s)
- Giampaolo Barone
- Dipartimento di Chimica Inorganica e Analitica Stanislao Cannizzaro, Università di Palermo, Parco d'Orleans II, Italy.
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Basu Baul TS, Singh KS, Holčapek M, Jirásko R, Rivarola E, Linden A. Synthesis, characterization and crystal structures of polymeric and dimeric triphenyltin(IV) complexes of 4-[((E)-1-{2-hydroxy-5-[(E)-2-(2-carboxyphenyl)-1-diazenyl]phenyl}methylidene)amino]aryls. J Organomet Chem 2005. [DOI: 10.1016/j.jorganchem.2005.06.030] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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35
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Hu C, Noll BC, Schulz CE, Scheidt WR. Ligand orientation control in low-spin six-coordinate (porphinato)iron(II) species. Inorg Chem 2005; 44:4346-58. [PMID: 15934765 PMCID: PMC1502394 DOI: 10.1021/ic050320p] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The synthesis of a low-spin six-coordinate iron(II) porphyrinate in which the two axial ligands are forced to have a relative perpendicular orientation has been successfully accomplished for the first time. The reaction of four-coordinate (tetramesitylporphinato)iron(II) with 2-methylimidazole leads to the preparation of [Fe(TMP)(2-MeHIm)(2)] which cocrystallizes with five-coordinate [Fe(TMP)(2-MeHIm)]. The six-coordinate complex accommodates the sterically crowded pair of imidazoles with a strongly ruffled core and relative perpendicular orientation. This leads to shortened equatorial bonds of 1.963(6) A and slightly elongated axial Fe-N bond lengths of 2.034(9) A that are about 0.04 A shorter and 0.03 A longer, respectively, in comparison to those of the bis-imidazole-ligated iron(II) species with parallel oriented axial ligands. The Mossbauer spectrum shows a pair of quadrupole doublets that can be assigned to the components of the cocrystallized crystalline solid. High-spin five-coordinate [Fe(TMP)(2-MeHIm)] has DeltaE(Q) = 2.25 mm/s and delta = 0.90 mm/s at 15 K. The quadrupole splitting, DeltaE(Q), for [Fe(TMP)(2-MeHIm)(2)] is 1.71 mm/s, and the isomer shift is 0.43 mm/s at 15 K. The quadrupole splitting value is significantly larger than that found for low-spin iron(II) derivatives with relative parallel orientations for the two axial ligands. Mossbauer spectra thus provide a probe for ligand orientation when structural data are otherwise not available.
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Affiliation(s)
- Chuanjiang Hu
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
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Silver J, Withnall R. Probes of structural and electronic environments of phosphor activators: Mössbauer and Raman spectroscopy. Chem Rev 2005; 104:2833-55. [PMID: 15186182 DOI: 10.1021/cr0203544] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jack Silver
- Center for Phosphors and Display Materials, University of Greenwich, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK.
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Barbieri R, Silvestri A, Huber F. A119Sn Mössbauer spectroscopic study on complexes of di-and tri-organotin(IV) moieties with 2-mercaptoethanesulfonates, in the solid state and in aqueous solution. Appl Organomet Chem 2004. [DOI: 10.1002/aoc.590020508] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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38
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Szorcsik A, Nagy L, Deák A, Scopelliti M, Fekete ZA, Császár Á, Pellerito C, Pellerito L. Preparation and structural studies on the tBu2Sn(IV) complexes with aromatic mono- and dicarboxylic acids containing hetero {N} donor atom. J Organomet Chem 2004. [DOI: 10.1016/j.jorganchem.2004.05.045] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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39
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Cao C, Dahal S, Shang M, Beatty AM, Hibbs W, Schulz CE, Scheidt WR. Effect of the sixth axial ligand in CS-ligated iron(II)octaethylporphyrinates: structural and Mössbauer studies. Inorg Chem 2003; 42:5202-10. [PMID: 12924891 PMCID: PMC1993896 DOI: 10.1021/ic030043r] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The effect of a sixth ligand in a series of low-spin thiocarbonyl-ligated iron(II)octaethylporphyrinates has been investigated. Six-coordinate complexes have been synthesized and characterized by Mössbauer and infrared spectroscopy and single-crystal X-ray structure determinations. The results are compared with the five-coordinate parent complex. The crystal structures of [Fe(OEP)(CS)(1-MeIm)] and [Fe(OEP)(CS)(Py)] are reported and discussed. The 1-methylimidazole and pyridine derivatives exhibit Fe-C(CS) bond distances of 1.703(4) and 1.706(2) A that are significantly longer than the 1.662(3) A reported for five-coordinate [Fe(OEP)(CS)] (Scheidt, W. R.; Geiger, D. K. Inorg. Chem. 1982, 21, 1208). The trans Fe-N(ligand) distances of 2.112(3) and 2.1550(15) A observed for the 1-methylimidazole and pyridine complex are approximately 0.13 A longer than those observed for analogous bis-ligated complexes and are consistent with a significant structural trans effect for the CS ligand. Mössbauer investigations carried out for five- and six-coordinate thiocarbonyl derivatives with several different sixth axial ligands reveal interesting features. All derivatives exhibit very small isomer shift values, consistent with a very strong interaction between iron and CS. The five-coordinate derivative has delta(Fe) = 0.08 mm/s, and the six-coordinate complexes exhibit delta(Fe) = 0.14 to 0.19 mm/s at 4.2 K. The five-coordinate complex shows a large quadrupole splitting (DeltaE(q) = 1.93 mm/s at 4.2 K) which is reduced on coordination of the sixth ligand (DeltaE(q) = 0.42-0.80 mm/s at 4.2 K). Addition of a sixth ligand also leads to a small decrease in the value of nu(CS). Correlations in structural, IR, and Mössbauer results suggest that the sixth ligand effect is primarily induced by changes in sigma-bonding. The structure of [Fe(OEP)(CS)(CH(3)OH)] is briefly reported. Crystal data: [Fe(OEP)(CS)(1-MeIm)] crystallizes in the monoclinic system, space group P2(1)/n, Z = 4, a = 9.5906(5) A, b = 16.704(4) A, c = 23.1417(6) A, beta = 100.453(7) degrees. [Fe(OEP)(CS)(Py)] crystallizes in the triclinic system, space group P1, Z = 5, a = 13.9073(6) A, b = 16.2624(7) A, c = 22.0709(9) A, alpha = 70.586(1) degrees, beta = 77.242(1) degrees, gamma = 77.959(1) degrees. [Fe(OEP)(CS)(CH(3)OH)] crystallizes in the triclinic system, space group P1, Z = 1, a = 9.0599(5) A, b = 9.4389(5) A, c = 11.0676(6) A, alpha = 90.261(1) degrees, beta = 100.362(1) degrees, gamma = 114.664(1) degrees.
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Affiliation(s)
| | | | | | | | | | - Charles E. Schulz
- *To whom correspondence should be addressed, E-mail: , Fax (574) 631-4044
| | - W. Robert Scheidt
- *To whom correspondence should be addressed, E-mail: , Fax (574) 631-4044
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Xanthopoulou MN, Hadjikakou SK, Hadjiliadis N, Schürmann M, Jurkschat K, Michaelides A, Skoulika S, Bakas T, Binolis J, Karkabounas S, Charalabopoulos K. Synthesis, structural characterization and in vitro cytotoxicity of organotin(IV) derivatives of heterocyclic thioamides, 2-mercaptobenzothiazole, 5-chloro-2-mercaptobenzothiazole, 3-methyl-2-mercaptobenzothiazole and 2-mercaptonicotinic acid. J Inorg Biochem 2003; 96:425-34. [PMID: 12888279 DOI: 10.1016/s0162-0134(03)00178-8] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Five new organotin(IV) molecules with the heterocyclic thioamides; 2-mercaptobenzothiazole (Hmbzt), 5-chloro-2-mercaptobenzothiazole (Hcmbzt), 3-methyl-2-mercaptobenzothiazole (mmbzt) and 2-mercaptonicotinic acid (H(2)mna) of formulae [(n-C(4)H(9))(2)Sn(mbzt)(2)] (1), [(C(6)H(5))(2)Sn(mbzt)(2)] (2), [(CH(3))(2)Sn(cmbzt)(2)].1.7(H(2)O)] (3), [(n-C(4)H(9))(2)SnCl(2)(mmbzt)(2).(CH(2)Cl(2))] (4) and [[(C(6)H(5))(3)Sn](2)(mna).[(CH(3))(2)CO]] (5) have been synthesized and characterized by elemental analysis, 1H-, 13C-NMR, FT-IR and Mössbauer spectroscopic techniques. Crystal structures of molecules 1, 3 and 5 have been determined by X-ray diffraction at 173(1) K (1 and 5) and 293(2) K (3). Compound 1 C(22)H(26)N(2)S(4)Sn, is monoclinic, space group C2/c, a=44.018(2), b=8.8864(5), c=12.8633(7) A, beta=104.195(5) degrees, Z=8. Compound 3 is also monoclinic, space group P2(1)/c and a=17.128(2) A, b=17.919(2) A, c=7.3580(10) A, beta=98.290(10) degrees, Z=4. In both molecules 1 and 3, two carbon atoms from aryl groups, two sulfur and two nitrogen atoms from thione ligands form a distorted octahedral geometry around tin(IV) with trans-C(2), cis-N(2), cis-S(2) configurations. Compound 5 C(45)H(39)NO(3)SSn(2) is monoclinic, space group P2(1)/n, a=9.1148(2) A, b=29.2819(6), c=15.5556(4) A, beta=106.2851(9) degrees, Z=4. Complex 5 contains two [(C(6)H(5))(3)Sn(IV)] moieties linked by a double deprotonated 2-mercaptonicotinic acid (H(2)mna). Both tin(IV) ions are five coordinated. This complex is the an example of a pentacoordinated Ph(3)SnXY system with an axial-equatorial arrangement of the phenyl groups at Sn(1) atom. Compounds 1, 3 and 5 were tested for in vitro cytotoxicity against the cancer cell line of sarcoma cells (mesenchymal tissue) from the Wistar rat, polycyclic aromatic hydrocarbons (benzo[a]pyrene) carcinogenesis. Compound 5 exhibits strong cytotoxic activity, while complexes 1 and 3 show less cytotoxic activity.
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Affiliation(s)
- Marianna N Xanthopoulou
- Inorganic and Analytical Chemistry, Department of Chemistry, University of Ioannina, 45110, Ioannina, Greece
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Jankovics H, Nagy L, Kele Z, Pettinari C, D'Agati P, Mansueto C, Pellerito C, Pellerito L. Coordination properties of the ACE inhibitor captopril towards Me2Sn(IV)2+ in aqueous solution, and biological aspects of some dialkyltin(IV) derivatives of this ligand. J Organomet Chem 2003. [DOI: 10.1016/s0022-328x(03)00015-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Bertazzi N, Bruschetta G, Casella G, Pellerito L, Rotondo E, Scopelliti M. Diorganotin(IV) complexes ofD-galacturonic acid: solid-state and solution-phase structural study. Appl Organomet Chem 2003. [DOI: 10.1002/aoc.556] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Jankovics H, Nagy L, Buzás N, Pellerito L, Barbieri R. Coordination properties of adenosine-5'-monophosphate and related ligands towards Me2Sn(IV)2+ in aqueous solution. J Inorg Biochem 2002; 92:55-64. [PMID: 12230988 DOI: 10.1016/s0162-0134(02)00470-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The coordination of Me2Sn(IV)2+ to adenosine-5'-monophosphate (AMP) and the related compounds D-ribose-5-phosphate (R5P), D-glucose-1-phosphate (G1P) and D-glucose-6-phosphate (G6P) in aqueous solution was investigated by means of potentiometric titration, and 1H-, 31P-NMR and Mössbauer spectroscopic methods in the pH range 2-11 (I=0.1 M NaClO4, 298 K). The complex of AMP and Me2Sn(IV)2+ precipitated at low pH was characterised by elemental analysis, FT-IR and Mössbauer spectroscopic methods. From a comparison of the pK values obtained in the presence and absence of metal ion and the stability constants for the different systems, the coordination of [N] is excluded, while bidentate coordination of the phosphate group is presumed. Mössbauer spectroscopic measurements recorded in the glassy state confirmed bidentate coordination of the phosphate and the formation of mixed hydroxo complexes in the weakly acidic, neutral and strongly basic pH range. With increasing pH, the phosphate groups were replaced by the deprotonated alcoholic [O] atoms of the sugar moiety. The solid complex proved to be tbp structure with bidentate phosphate coordination.
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Affiliation(s)
- H Jankovics
- Research Group on Biocoordination Chemistry of the Hungarian Academy of Sciences, University of Szeged, Szeged, Hungary
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Sham TK, Bancroft GM. Tin-119 Moessbauer quadrupole splittings for distorted dimethyltin(IV) structures. Inorg Chem 2002. [DOI: 10.1021/ic50151a057] [Citation(s) in RCA: 129] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Garwood WE, Chen NY, Bailar JC. Aluminum removal from dense zeolites by aqueous chromium(III) salt solutions. Inorg Chem 2002. [DOI: 10.1021/ic50159a012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bramley R, Creaser II, Mackey DJ, Sargeson AM. Proton chemical shifts and diamagnetic anisotropy in cobalt(III) pentaammine complexes. Inorg Chem 2002. [DOI: 10.1021/ic50180a010] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bancroft GM, Malmquist PA, Svensson S, Basilier E, Gelius U, Siegbahn K. Gas-phase ESCA studies of valence and core levels in xenon difluoride and xenon tetrafluoride. Inorg Chem 2002. [DOI: 10.1021/ic50184a040] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Di Stefano R, Scopelliti M, Pellerito C, Fiore T, Vitturi R, Colomba MS, Gianguzza P, Stocco GC, Consiglio M, Pellerito L. Organometallic complexes with biological molecules. XVII. Triorganotin(IV) complexes with amoxicillin and ampicillin. J Inorg Biochem 2002; 89:279-92. [PMID: 12062133 DOI: 10.1016/s0162-0134(02)00366-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Novel triorganotin(IV) complexes of two beta-lactamic antibiotics, 6-[D-(-)-beta-amino-p-hydroxyphenyl-acetamido]penicillin (=amoxicillin) and 6-[D-(-)-alpha-aminobenzyl]penicillin (=ampicillin), have been synthesized and investigated both in solid and solution states. The complexes corresponded to the general formula R(3)Sn(IV)antib*H(2)O (R=Me, n-Bu, Ph; antib=amox=amoxicillinate or amp=ampicillinate). Structural investigations about configuration in the solid state have been carried out by interpreting experimental IR and 119Sn Mössbauer data. In particular, IR results suggested polymeric structures both for R(3)Sn(IV)amox.H(2)O and R(3)Sn(IV)amp*H(2)O. Moreover, both antibiotics appear to behave as monoanionic bidentate ligands coordinating the tin(IV) atom through ester-type carboxylate, as well as through the beta-lactamic carbonyl. Evidence that in none of these compounds water molecules were involved in coordination, was provided by thermogravimetric investigations. On the basis of 119Sn Mössbauer spectroscopy it can be inferred that tin(IV) was pentacoordinate in all of the complexes in the solid state, showing an equatorial R(3)Sn(IV) trigonal bipyramidal (tbp) configuration. The nature of the complexes in solution state was investigated by using 1H and 13C nuclear magnetic resonance (NMR) spectroscopy, while an 119Sn spectrum was obtained for n-Bu(3)Sn(IV)amp*H(2)O. Although 1H- and 13C-NMR measurements suggested that in dimethyl sulfoxide (DMSO)-d(6) solution the polymeric structure collapsed, due to a solvolysis process of the beta-lactamic carbonyl bonding to the organometallic moiety, the complexes have been shown to maintain the same trigonal bipyramidal configuration at tin(IV) atom by the coordination of a DMSO molecule. Cytotoxic activity of these novel semisynthetic antibiotic derivatives has been tested towards spermatocyte chromosomes of the mussel Brachidontes pharaonis (Mollusca: Bivalvia) using two different chromosome-staining techniques such as Giemsa and CMA(3). The occurrence of typical colchicinized-like (c-like) mitoses on slides obtained from animals exposed to organotin compounds, directly confirmed the high mitotic spindle-inhibiting potency of these chemicals. In addition, by comparative analysis of spermatocyte chromosomes from untreated specimens (negative controls) and specimens treated with the triorganotin(IV) complexes, structural damages such as 'achromatic lesions' and 'chromosome breakages' have been identified.
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Affiliation(s)
- R Di Stefano
- Dipartimento di Chimica Inorganica, Università di Palermo, Viale delle Scienze, Parco d'Orleans, 90128, Italy
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Fiore T, Foti C, Gianguzza A, Orecchio S, Pellerito L. D-Glucuronate complexes of mono-, di- and triorgano tin(IV) compounds: potentiometric and Mössbauer spectroscopic investigations. Appl Organomet Chem 2002. [DOI: 10.1002/aoc.306] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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