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Kumar M, Nayek HP. Syntheses and exploration of the catalytic activities of organotin(IV) compounds. Dalton Trans 2024; 53:9827-9837. [PMID: 38804088 DOI: 10.1039/d4dt00646a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Six organotin(IV) compounds (1-6) have been synthesized by reaction of the polydentate pro-ligands H3L and H2L, respectively, with the corresponding diorganotin chlorides. All of the compounds were characterized by FT-IR spectroscopy, 1H, 13C{1H}, and 119Sn (1H) NMR spectroscopy, HRMS spectrometry, and single-crystal X-ray diffraction. The solid-state structures show that all of the compounds are monomeric (except compound 3) and contain a penta-coordinated tin atom. Compound 3 is a dimer with two hexa-coordinated tin atoms. Compounds 1-3 contain a non-coordinated hydroxymethyl group. All of the compounds have been screened for their catalytic efficacy in the synthesis of 1,2 disubstituted benzimidazoles using o-phenylenediamine and aldehyde derivatives. It has been observed that both the Lewis acidic Sn(IV) centre and the hydroxymethyl group (hydrogen bond donor) catalyse the reactions with a product yield of up to 92%.
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Affiliation(s)
- Manish Kumar
- Department of Chemistry & Chemical Biology, Indian Institute of Technology (Indian School of Mines), Dhanbad-826004, Jharkhand, India.
| | - Hari Pada Nayek
- Department of Chemistry & Chemical Biology, Indian Institute of Technology (Indian School of Mines), Dhanbad-826004, Jharkhand, India.
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2
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Bouška M, Novák M, Dostál L, Růžička A, Mikysek T, Metelka R, Jambor R. Oxidative Addition of Diorgano Disulfides to Distannyne [{2,6-(Me2NCH2)2C6H3}Sn]2. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300907] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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3
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Mairychová B, Svoboda T, Erben M, Růžička A, Dostál L, Jambor R. Intramolecularly Coordinated Group 14 and 15 Chalcogenites. Organometallics 2013. [DOI: 10.1021/om3009553] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Barbora Mairychová
- Department of General and Inorganic Chemistry, Faculty
of Chemical Technology, University of Pardubice, Studentská 95, CZ-532 10, Pardubice, Czech Republic
| | - Tomáš Svoboda
- Department of General and Inorganic Chemistry, Faculty
of Chemical Technology, University of Pardubice, Studentská 95, CZ-532 10, Pardubice, Czech Republic
| | - Milan Erben
- Department of General and Inorganic Chemistry, Faculty
of Chemical Technology, University of Pardubice, Studentská 95, CZ-532 10, Pardubice, Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty
of Chemical Technology, University of Pardubice, Studentská 95, CZ-532 10, Pardubice, Czech Republic
| | - Libor Dostál
- Department of General and Inorganic Chemistry, Faculty
of Chemical Technology, University of Pardubice, Studentská 95, CZ-532 10, Pardubice, Czech Republic
| | - Roman Jambor
- Department of General and Inorganic Chemistry, Faculty
of Chemical Technology, University of Pardubice, Studentská 95, CZ-532 10, Pardubice, Czech Republic
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4
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Däschlein C, Bauer JO, Strohmann C. From the selective cleavage of the Si-O-Si bond in disiloxanes to zwitterionic, water-stable zinc silanolates. Angew Chem Int Ed Engl 2010; 48:8074-7. [PMID: 19780083 DOI: 10.1002/anie.200902318] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Christian Däschlein
- Anorganische Chemie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44227 Dortmund, Germany
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5
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Däschlein C, Bauer J, Strohmann C. From the Selective Cleavage of the Si-O-Si Bond in Disiloxanes to Zwitterionic, Water-Stable Zinc Silanolates. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200902318] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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6
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Five new dicarboxylate organotin complexes under hydrothermal condition: Syntheses, characterization and crystal structures of 1D, 2D and 3D polymers constructed from dimeric tetraorganodistannoxane units. Polyhedron 2008. [DOI: 10.1016/j.poly.2008.06.039] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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7
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Chandrasekhar V, Gopal K, Nagendran S, Singh P, Steiner A, Zacchini S, Bickley JF. Organostannoxane-Supported Multiferrocenyl Assemblies: Synthesis, Novel Supramolecular Structures, and Electrochemistry. Chemistry 2005; 11:5437-48. [PMID: 16003824 DOI: 10.1002/chem.200500316] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Organostannoxane-based multiredox assemblies containing ferrocenyl peripheries have been readily synthesized by a simple one-pot synthesis, either by a solution method or by room-temperature solid-state synthesis, in nearly quantitative yields. The number of ferrocenyl units in the multiredox assembly is readily varied by stoichiometric control as well as by the choice of the organotin precursors. Thus, the reaction of the diorganotin oxides, R2SnO (R = Ph, nBu and tBu) with ferrocene carboxylic acid affords tetra-, di-, and mononuclear derivatives [{Ph2Sn[OC(O)Fc]2}2] (1), [{[nBu2SnOC(O)Fc]2O}2] (2), [nBu2Sn{OC(O)Fc}2] (3), [{tBu2Sn(OH)OC(O)Fc}2] (4), and [tBu2Sn{OC(O)Fc}2] (5) (Fc = eta(5)C5H4-Fe-eta(5)C5H5). The reaction of triorganotin oxides, R3SnOSnR3 (R = nBu and Ph) with ferrocene carboxylic acid leads to the formation of the mono-nuclear derivatives [Ph3SnOC(O)Fc] (6) and [{nBu3SnOC(O)Fc}(n)] (7). Molecular structures of the compounds 1-4 and 6 have been determined by single-crystal X-ray analysis. The molecular structure of compound 1 is new among organotin carboxylates. In this compound, ferrocenyl carboxylates are involved in both chelating and bridging coordination modes to the tin atoms to form an eight-membered cyclic structure. In all of these compounds, the acidic protons of the cyclopentadienyl groups are hydrogen bonded to the carboxylate oxygens (C-HO) to form rich supramolecular assemblies. In addition to this, pi-pi, T-shaped, L-shaped, and side-to-face stacking interactions involving ferrocenyl groups also occur. Compound 6 shows an interesting and novel intermolecular CO2-pi stacking interaction. Electrochemical analysis of the compounds 1-4, 6, and 7 shows a single, quasi-reversible oxidation peak corresponding to the simultaneous oxidation of four, two, and one ferrocenyl substituents, respectively. Compound 5 shows two quasi-reversible oxidation peaks. This is attributed to the positional difference among the ferrocenyl substituents on the tin atom. Additionally, while compounds 2 and 4 are electrochemically quite robust and do not decompose even after ten continuous CV cycles, compounds 1, and 3, 5-7 start to show decomposition after five cycles.
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Farfán N, Mancilla T, Santillan R, Gutiérrez A, Zamudio-Rivera LS, Beltrán HI. Preference of di-n-butyltinIV compounds to build O⋯Sn bonds in fused rings with five-six members. J Organomet Chem 2004. [DOI: 10.1016/j.jorganchem.2004.07.053] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Beckmann J, Dakternieks D, Duthie A, Sheen Kuan F, Jurkschat K, Schürmann M, Tiekink ERT. Synthesis and structures of new oligomethylene-bridged double ladders. How far can the layers be separated? NEW J CHEM 2004. [DOI: 10.1039/b316009b] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Biesemans M, Duthie A, Jurkschat K, Verbruggen I, Willem R, Zobel B. Transients from a mixture of [(R(O)Sn)2C(CH3)2]2 and (RCl2Sn)2C(CH3)2 [R = (SiMe3)2CH]: an identificationin situ by 1D119Sn and 2D1H?119Sn HMQC NMR spectroscopy and electrospray mass spectrometry. Appl Organomet Chem 2003. [DOI: 10.1002/aoc.443] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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11
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Beckmann J, Dakternieks D, Kuan FS, Tiekink ER. A novel route for the preparation of dimeric tetraorganodistannoxanes. J Organomet Chem 2002. [DOI: 10.1016/s0022-328x(02)01705-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Beckmann J, Jurkschat K, Schürmann M, Suter D, Willem R. Synthesis and Molecular Structure of a Tricyclic Stannasiloxane Containing a Novel SiSn3O3F2 Structural Motif. Organometallics 2002. [DOI: 10.1021/om0203577] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jens Beckmann
- Lehrstuhl für Anorganische Chemie II, Fachbereich Chemie der Universität Dortmund, D-44221 Dortmund, Germany, Lehrstuhl für Experimentelle Physik III, Fachbereich Physik der Universität Dortmund, D-44221 Dortmund, Germany, and High-Resolution NMR Centre (HNMR), Free University of Brussels (VUB), Pleinlaan 2, B-1050 Brussels, Belgium
| | - Klaus Jurkschat
- Lehrstuhl für Anorganische Chemie II, Fachbereich Chemie der Universität Dortmund, D-44221 Dortmund, Germany, Lehrstuhl für Experimentelle Physik III, Fachbereich Physik der Universität Dortmund, D-44221 Dortmund, Germany, and High-Resolution NMR Centre (HNMR), Free University of Brussels (VUB), Pleinlaan 2, B-1050 Brussels, Belgium
| | - Markus Schürmann
- Lehrstuhl für Anorganische Chemie II, Fachbereich Chemie der Universität Dortmund, D-44221 Dortmund, Germany, Lehrstuhl für Experimentelle Physik III, Fachbereich Physik der Universität Dortmund, D-44221 Dortmund, Germany, and High-Resolution NMR Centre (HNMR), Free University of Brussels (VUB), Pleinlaan 2, B-1050 Brussels, Belgium
| | - Dieter Suter
- Lehrstuhl für Anorganische Chemie II, Fachbereich Chemie der Universität Dortmund, D-44221 Dortmund, Germany, Lehrstuhl für Experimentelle Physik III, Fachbereich Physik der Universität Dortmund, D-44221 Dortmund, Germany, and High-Resolution NMR Centre (HNMR), Free University of Brussels (VUB), Pleinlaan 2, B-1050 Brussels, Belgium
| | - Rudolph Willem
- Lehrstuhl für Anorganische Chemie II, Fachbereich Chemie der Universität Dortmund, D-44221 Dortmund, Germany, Lehrstuhl für Experimentelle Physik III, Fachbereich Physik der Universität Dortmund, D-44221 Dortmund, Germany, and High-Resolution NMR Centre (HNMR), Free University of Brussels (VUB), Pleinlaan 2, B-1050 Brussels, Belgium
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Sharma V, Sharma RK, Bohra R, Ratnani R, Jain VK, Drake JE, Hursthouse MB, Light ME. Synthesis, spectroscopic and structural aspects of some tetraorganodistannoxanes with internally functionalized oxime: crystal and molecular structures of [{R2Sn(ONC(Me)py)}2O]2 (R=Bun and Et) and 2-NC5H4C(Me)NOH. J Organomet Chem 2002. [DOI: 10.1016/s0022-328x(02)01330-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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15
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Beckmann J, Henn M, Jurkschat K, Schürmann M, Dakternieks D, Duthie A. Hydrolysis of Bis((trimethylsilyl)methyl)tin Dihalides. Crystallographic and Spectroscopic Study of the Hydrolysis Pathway. Organometallics 2001. [DOI: 10.1021/om010715q] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Gunji T, Gomi T, Sanji T, Abe Y. Syntheses and Characterization of Disilane Unit Containing Polytitana- and Polyzirconasiloxanes. CHEM LETT 2001. [DOI: 10.1246/cl.2001.1106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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17
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Reyes-García EA, Cervantes-Lee F, Pannell KH. Synthesis, Spectroscopic, and Substituent-Dependent Self-Assembling Structural Characterization of Ferrocenyl-Containing Silanediols, Fc(R)Si(OH)2, R = Me, CH2CHCH2, n-Bu, t-Bu, Ph, c-Hx, Including Transformation to a Ferrocenyl Stannasiloxane, [OSiFc(n-Bu)O(t-Bu2)Sn]2. Organometallics 2001. [DOI: 10.1021/om010378l] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Keith H. Pannell
- Department of Chemistry, University of Texas at El Paso, El Paso, Texas 79968-0513
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Beckmann J, Jurkschat K, Kaltenbrunner U, Rabe S, Schürmann M, Dakternieks D, Duthie A, Müller D. Cohydrolysis of Organotin Chlorides with Trimethylchlorosilane. Okawara's Pioneering Work Revisited and Extended. Organometallics 2000. [DOI: 10.1021/om000588i] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Dirk Müller
- Institut für Angewandte Chemie, Rudower Chaussee 5, 12484 Berlin, Germany
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20
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Koch T, Blaurock S, Somoza FB, Voigt A, Kirmse R, Hey-Hawkins E. Unexpected P-Si or P-C Bond Cleavage in the Reaction of Li 2[(C 5Me 4)SiMe 2-PR] (R = Cyclohexyl, 2,4,6-Me 3C 6H 2) and Li[(C 5H 4)CMe 2-PHR] (R = Ph, tBu) with ZrCl 4 or [TiCl 3(thf) 3]: Formation and Molecular Structure of the ansa-Metallocenes [{(η-C 5Me 4) 2SiMe 2}ZrCl 2] and [{(η-C 5H 4) 2CMe 2}MCl 2] (M = Ti, Zr). Organometallics 2000. [DOI: 10.1021/om000690f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Xiong RG, Zuo JL, You XZ, Fun HK, Raj. A Novel Rhombohedral Grid Based on Tetraorganodistannoxane as Corner Unit. Organometallics 2000. [DOI: 10.1021/om0002531] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Boegeat D, Jousseaume B, Toupance T, Campet G, Fournès L. The first mixed-valence fluorotin alkoxides: new sol-gel precursors of fluorine-doped tin oxide materials. Inorg Chem 2000; 39:3924-7. [PMID: 11196790 DOI: 10.1021/ic000111z] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- D Boegeat
- Laboratoire de Chimie Organique et Organométallique, UMR 5802 CNRS, Université Bordeaux I, 351 Cours de la Libération, F-33405 Talence, France
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Beckmann J, Jurkschat K, Rabe S, Schürmann M, Dakternieks D, Duthie A. Condensation of Diphenylsilane Diol through Organostannoxane Catalysis: A Case Study. Organometallics 2000. [DOI: 10.1021/om990970z] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jens Beckmann
- Lehrstuhl für Anorganische Chemie II der Universität Dortmund, D-44221 Dortmund, Germany, and Centre for Chiral and Molecular Technologies, Deakin University, Geelong 3217, Australia
| | - Klaus Jurkschat
- Lehrstuhl für Anorganische Chemie II der Universität Dortmund, D-44221 Dortmund, Germany, and Centre for Chiral and Molecular Technologies, Deakin University, Geelong 3217, Australia
| | - Stephanie Rabe
- Lehrstuhl für Anorganische Chemie II der Universität Dortmund, D-44221 Dortmund, Germany, and Centre for Chiral and Molecular Technologies, Deakin University, Geelong 3217, Australia
| | - Markus Schürmann
- Lehrstuhl für Anorganische Chemie II der Universität Dortmund, D-44221 Dortmund, Germany, and Centre for Chiral and Molecular Technologies, Deakin University, Geelong 3217, Australia
| | - Dainis Dakternieks
- Lehrstuhl für Anorganische Chemie II der Universität Dortmund, D-44221 Dortmund, Germany, and Centre for Chiral and Molecular Technologies, Deakin University, Geelong 3217, Australia
| | - Andrew Duthie
- Lehrstuhl für Anorganische Chemie II der Universität Dortmund, D-44221 Dortmund, Germany, and Centre for Chiral and Molecular Technologies, Deakin University, Geelong 3217, Australia
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Beckmann J, Jurkschat K, Schürmann M. Crystal and molecular structure of di- tert -butylhydridosilanol. J Organomet Chem 2000. [DOI: 10.1016/s0022-328x(00)00152-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Gamard A, Jousseaume B, Toupance T, Campet G. New Fluorinated Stannic Compounds as Precursors of F-Doped SnO(2) Materials Prepared by the Sol-Gel Route. Inorg Chem 1999; 38:4671-4679. [PMID: 11671190 DOI: 10.1021/ic990163s] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Dialkoxydi(beta-diketonate)tin(IV) compounds react either with difluorodi(beta-diketonate)tin(IV) or with butanoyl fluoride to yield novel tin complexes Sn(OR(1))F(R(2)COCHCOR(2))(2) 1 (R(1) = tert-amyl, isopropyl, ethyl; R(2) = methyl, tert-butyl). Multinuclear (1)H, (13)C, (19)F, and (119)Sn NMR spectroscopic characterization showed that complexes 1 are octahedral in solution with a cis configuration for the fluorine and the alkoxide group. Kinetics of configurational rearrangements were studied by variable-temperature (13)C NMR spectroscopy. The hydrolytic behavior of 1 was determined for different hydrolysis ratios h = [H(2)O]/[1]. For R(1) = tert-amyl, a dimeric fluorinated species was mainly obtained for h = 0.5, and addition of 2 mol equiv of water led to a fluorinated stannic oxopolymer soluble in CH(3)CN. In the latter case, the powder obtained after solvent elimination and treatment in air at 550 degrees C consisted of crystalline SnO(2) cassiterite particles containing the required amount (3 mol %) of doping fluorine and exhibiting electronic conductivity comparable to that of Sn-doped In(2)O(3). Complexes 1 are the first precursors of F-doped SnO(2) materials prepared by the sol-gel route.
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Affiliation(s)
- A. Gamard
- Laboratoire de Chimie Organique et Organométallique, UMR 5802 CNRS, Université Bordeaux I, 351 Cours de la Libération, F-33405 Talence Cedex, France, and Institut de Chimie de la Matière Condensée de Bordeaux, UPR 9048 CNRS, Château Brivazac, Avenue du Docteur A. Schweitzer, F-33608 Pessac Cedex, France
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Beckmann J, Jurkschat K, Kaltenbrunner U, Pieper N, Schürmann M. Strained Metallastannoxanes−Ring-Opening Polymerization versus Retention of Six-Membered-Ring Structure†. Organometallics 1999. [DOI: 10.1021/om980790+] [Citation(s) in RCA: 32] [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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Jurkschat K. Stannasiloxanes. Syntheses, Structures, and Surprises. PHOSPHORUS SULFUR 1999. [DOI: 10.1080/10426509908546386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Klaus Jurkschat
- a Lehrstuhl für Anorganische Chemie II der Universität Dortmund , D-44221 Dortmund, Germany
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28
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Mercier FAG, Meddour A, Gielen M, Biesemans M, Willem R, Tiekink ERT. Crystal Structures of μ2-Fluoro- and μ2-Salicylaldoximato-Bridged μ3-Oxo-tris(dimethyltin(IV)) Bis(salicylaldoximate). Organometallics 1998. [DOI: 10.1021/om980609x] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Frédéric A. G. Mercier
- High-Resolution NMR Centre (HNMR) and Laboratory of General and Organic Chemistry of the Faculty of Applied Sciences (AOSC), Free University of Brussels (VUB), Pleinlaan 2, B-1050 Brussel, Belgium
| | - Abdelkrim Meddour
- High-Resolution NMR Centre (HNMR) and Laboratory of General and Organic Chemistry of the Faculty of Applied Sciences (AOSC), Free University of Brussels (VUB), Pleinlaan 2, B-1050 Brussel, Belgium
| | - Marcel Gielen
- High-Resolution NMR Centre (HNMR) and Laboratory of General and Organic Chemistry of the Faculty of Applied Sciences (AOSC), Free University of Brussels (VUB), Pleinlaan 2, B-1050 Brussel, Belgium
| | - Monique Biesemans
- High-Resolution NMR Centre (HNMR) and Laboratory of General and Organic Chemistry of the Faculty of Applied Sciences (AOSC), Free University of Brussels (VUB), Pleinlaan 2, B-1050 Brussel, Belgium
| | - Rudolph Willem
- High-Resolution NMR Centre (HNMR) and Laboratory of General and Organic Chemistry of the Faculty of Applied Sciences (AOSC), Free University of Brussels (VUB), Pleinlaan 2, B-1050 Brussel, Belgium
| | - Edward R. T. Tiekink
- Department of Chemistry, The University of Adelaide, South Australia 5005, Australia
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