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Bauer JO, Espinosa‐Jalapa NA, Fontana N, Götz T, Falk A. Functional Group Variation in
tert
‐Butyldiphenylsilanes (TBDPS): Syntheses, Reactivities, and Effects on the Intermolecular Interaction Pattern in the Molecular Crystalline State. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100342] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jonathan O. Bauer
- Institut für Anorganische Chemie Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Germany
| | - Noel Angel Espinosa‐Jalapa
- Institut für Anorganische Chemie Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Germany
| | - Nicolò Fontana
- Institut für Anorganische Chemie Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Germany
| | - Tobias Götz
- Institut für Anorganische Chemie Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Germany
| | - Alexander Falk
- Institut für Anorganische Chemie Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Germany
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2
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Petkowski JJ, Bains W, Seager S. On the Potential of Silicon as a Building Block for Life. Life (Basel) 2020; 10:E84. [PMID: 32532048 PMCID: PMC7345352 DOI: 10.3390/life10060084] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 06/05/2020] [Accepted: 06/08/2020] [Indexed: 12/21/2022] Open
Abstract
Despite more than one hundred years of work on organosilicon chemistry, the basis for the plausibility of silicon-based life has never been systematically addressed nor objectively reviewed. We provide a comprehensive assessment of the possibility of silicon-based biochemistry, based on a review of what is known and what has been modeled, even including speculative work. We assess whether or not silicon chemistry meets the requirements for chemical diversity and reactivity as compared to carbon. To expand the possibility of plausible silicon biochemistry, we explore silicon's chemical complexity in diverse solvents found in planetary environments, including water, cryosolvents, and sulfuric acid. In no environment is a life based primarily around silicon chemistry a plausible option. We find that in a water-rich environment silicon's chemical capacity is highly limited due to ubiquitous silica formation; silicon can likely only be used as a rare and specialized heteroatom. Cryosolvents (e.g., liquid N2) provide extremely low solubility of all molecules, including organosilicons. Sulfuric acid, surprisingly, appears to be able to support a much larger diversity of organosilicon chemistry than water.
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Affiliation(s)
- Janusz Jurand Petkowski
- Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA; (W.B.); (S.S.)
| | - William Bains
- Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA; (W.B.); (S.S.)
| | - Sara Seager
- Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA; (W.B.); (S.S.)
- Department of Physics, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA
- Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA
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3
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Baus JA, Tacke R. Neutral six-coordinate bis(dithiocarbamato)silicon(iv) complexes with an SiCl 2S 4 skeleton. Dalton Trans 2017; 46:8751-8755. [PMID: 27713941 DOI: 10.1039/c6dt03264h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Treatment of SiCl4 with lithium dithiocarbamates of the formula type Li[R2NCS2] (R = Ph, iPr) in a molar ratio of 1 : 2 afforded the respective six-coordinate silicon(iv) complexes [Ph2NCS2]2SiCl2 (3) and [iPr2NCS2]2SiCl2 (4), which were isolated as the solvates 3·MeCN and 4·MeCN. Compounds 3·MeCN and 4·MeCN were structurally characterised by single-crystal X-ray diffraction and multinuclear NMR spectroscopic studies in the solid state and in solution. In this study, dithiocarbamato ligands were implemented in silicon coordination chemistry for the first time. Compounds 3 and 4 represent the first six-coordinate silicon(iv) complexes with an SiCl2S4 skeleton.
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Affiliation(s)
- Johannes A Baus
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg, Germany.
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4
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Mück FM, Baus JA, Burschka C, Tacke R. Cationic Five-Coordinate Bis(guanidinato)silicon(IV) Complexes with SiN4 El Skeletons (El=S, Se): "Heterolytic Activation" of S-S and Se-Se Bonds. Chemistry 2016; 22:5830-4. [PMID: 26990121 DOI: 10.1002/chem.201505083] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Indexed: 11/12/2022]
Abstract
The donor-stabilized silylene [iPrNC(NiPr2 )NiPr]2 Si (2) reacts with PhEl-ElPh (El=S, Se) to form the respective cationic five-coordinate bis(guanidinato)silicon(IV) complexes {[iPrNC(NiPr2 )NiPr]2 SiSPh}(+) PhS(-) (4) and {[iPrNC (NiPr2 )NiPr]2 SiSePh}(+) PhSe(-) (5). Compounds 4 and 5 were characterized by crystal structure analyses and NMR spectroscopic studies in the solid state.
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Affiliation(s)
- Felix M Mück
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074, Würzburg, Germany
| | - Johannes A Baus
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074, Würzburg, Germany
| | - Christian Burschka
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074, Würzburg, Germany
| | - Reinhold Tacke
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074, Würzburg, Germany.
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5
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Steinhauer S, Böttcher T, Schwarze N, Neumann B, Stammler HG, Hoge B. Synthesis of chlorosilicates. Angew Chem Int Ed Engl 2014; 53:13269-72. [PMID: 25256121 DOI: 10.1002/anie.201406311] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Revised: 07/14/2014] [Indexed: 11/06/2022]
Abstract
Chlorosilicates represent important intermediates in S(N)2 reactions of chlorosilanes. They can be stabilized by the introduction of electron-withdrawing substituents. Salts of various (pentafluoroethyl)chlorosilicates have been isolated and structurally characterized.
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Affiliation(s)
- Simon Steinhauer
- Universität Bielefeld, Fakultät für Chemie, Centrum für Molekulare Materialien, Universitätsstrasse 25, 33615 Bielefeld (Germany)
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6
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Steinhauer S, Böttcher T, Schwarze N, Neumann B, Stammler HG, Hoge B. Synthese von Chlorosilicaten. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406311] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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7
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Breit NC, Szilvási T, Inoue S. New Route to Access an Acyl-Functionalized Phosphasilene and a Four-Membered Si-P-C-O Heterocycle. Chemistry 2014; 20:9312-8. [DOI: 10.1002/chem.201402693] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Indexed: 11/12/2022]
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8
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Weiß J, Sinner K, Baus JA, Burschka C, Tacke R. Neutral Hexacoordinate Silicon(IV) Complexes with aSiO4NC orSiO3N2C Skeleton and Neutral Pentacoordinate Silicon(IV) Complexes Containing a Trianionic TetradentateO,N,O,OLigand. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201301185] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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9
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Weiß J, Theis B, Baus JA, Burschka C, Bertermann R, Tacke R. Neutral Pentacoordinate Silicon(IV) Complexes with a Tridentate DianionicO,N,OorN,N,OLigand, an Anionic PhX Ligand (X = O, S, Se), and a Phenyl Group: Synthesis and Structural Characterization in the Solid State and in Solution. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300523] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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10
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Wagler J, Brendler E, Heine T, Zhechkov L. Disilicon complexes with two hexacoordinate Si atoms: paddlewheel-shaped isomers with (ClN4 )Si-Si(S4 Cl) and (ClN2 S2 )Si-Si(S2 N2 Cl) skeletons. Chemistry 2013; 19:14296-303. [PMID: 24009095 DOI: 10.1002/chem.201300452] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 06/07/2013] [Indexed: 11/11/2022]
Abstract
The reaction of 1-methyl-3-trimethylsilylimidazoline-2-thione with hexachlorodisilane proceeds toward substitution of four of the disilane Cl atoms during the formation of disilicon complexes with two neighboring hexacoordinate Si atoms. The N,S-bidentate methimazolide moieties adopt a buttressing role, thus forming paddlewheel-shaped complexes of the type ClSi(μ-mt)4 SiCl (mt=methimazolyl). Most interestingly, three isomers (i.e., with (ClN4 )SiSi(S4 Cl), (ClN3 S)SiSi(S3 NCl), and (ClN2 S2 )SiSi(S2 N2 Cl) skeletons as so-called (4,0), (3,1), and cis-(2,2) paddlewheels) were detected in solution by using (29) Si NMR spectroscopic analysis. Two of these isomers could be isolated as crystalline solids, thus allowing their molecular structures to be analyzed by using X-ray diffraction studies. In accord with time-dependent NMR spectroscopy, computational analyses proved the cis-(2,2) isomer with a (ClN2 S2 )SiSi(S2 N2 Cl) skeleton to be the most stable. The compounds presented herein are the first examples of crystallographically evidenced disilicon complexes with two SiSi-bonded octahedrally coordinated Si atoms and representatives of the still scarcely explored class of Si coordination compounds with sulfur donor atoms.
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Affiliation(s)
- Jörg Wagler
- Institut für Anorganische Chemie, TU Bergakademie Freiberg, 09596 Freiberg (Germany), Fax: (+49) 3731-39-4058.
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11
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Baus JA, Burschka C, Bertermann R, Guerra CF, Bickelhaupt FM, Tacke R. Neutral six-coordinate and cationic five-coordinate silicon(IV) complexes with two bidentate monoanionic N,S-pyridine-2-thiolato(-) ligands. Inorg Chem 2013; 52:10664-76. [PMID: 24011307 DOI: 10.1021/ic401698a] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A series of neutral six-coordinate silicon(IV) complexes (4-11) with two bidentate monoanionic N,S-pyridine-2-thiolato ligands and two monodentate ligands R(1) and R(2) was synthesized (4, R(1) = R(2) = Cl; 5, R(1) = Ph, R(2) = Cl; 6, R(1) = Ph, R(2) = F; 7, R(1) = Ph, R(2) = Br; 8, R(1) = Ph, R(2) = N3; 9, R(1) = Ph, R(2) = NCO; 10, R(1) = Ph, R(2) = NCS; 11, R(1) = Me, R(2) = Cl). In addition, the related ionic compound 12 was synthesized, which contains a cationic five-coordinate silicon(IV) complex with two bidentate monoanionic N,S-pyridine-2-thiolato ligands and one phenyl group (counterion: I(-)). Compounds 4-12 were characterized by elemental analyses, NMR spectroscopic studies in the solid state and in solution, and crystal structure analyses (except 7). These structural investigations were performed with a special emphasis on the sophisticated stereochemistry of these compounds. These experimental investigations were complemented by computational studies, including bonding analyses based on relativistic density functional theory.
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Affiliation(s)
- Johannes A Baus
- Institut für Anorganische Chemie, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
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12
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Böhme U, Fels S. A new type of chiral pentacoordinated silicon compounds with azomethine ligands made from acetylacetone and amino acids. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2013.04.045] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Böhme U, Fels S. A new type of chiral pentacoordinated silicon compounds with azomethine ligands made from acetylacetone and amino acids. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2013.04.045#doilink] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Autschbach J, Sutter K, Truflandier LA, Brendler E, Wagler J. Atomic Contributions from Spin-Orbit Coupling to29Si NMR Chemical Shifts in Metallasilatrane Complexes. Chemistry 2012; 18:12803-13. [DOI: 10.1002/chem.201200746] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Indexed: 11/11/2022]
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15
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Junold K, Baus JA, Burschka C, Tacke R. Bis[N,N′-diisopropylbenzamidinato(−)]silicon(II): A Silicon(II) Compound with Both a Bidentate and a Monodentate Amidinato Ligand. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201203109] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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16
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Junold K, Baus JA, Burschka C, Tacke R. Bis[N,N′-diisopropylbenzamidinato(−)]silicon(II): A Silicon(II) Compound with Both a Bidentate and a Monodentate Amidinato Ligand. Angew Chem Int Ed Engl 2012; 51:7020-3. [DOI: 10.1002/anie.201203109] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Indexed: 11/07/2022]
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17
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Weiß J, Theis B, Metz S, Burschka C, Fonseca Guerra C, Bickelhaupt FM, Tacke R. Neutral Pentacoordinate Halogeno‐ and Pseudohalogenosilicon(IV) Complexes with a Tridentate Dianionic
O
,
N
,
O
or
N
,
N
,
O
Ligand: Synthesis and Structural Characterization in the Solid State and in Solution. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200308] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jörg Weiß
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg, Germany, Fax: +49‐931‐31‐84609
| | - Bastian Theis
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg, Germany, Fax: +49‐931‐31‐84609
| | - Stefan Metz
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg, Germany, Fax: +49‐931‐31‐84609
| | - Christian Burschka
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg, Germany, Fax: +49‐931‐31‐84609
| | - Célia Fonseca Guerra
- Department of Theoretical Chemistry, Amsterdam Center for Multiscale Modeling, VU University, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, Fax: +31‐20‐59‐87629
| | - F. Matthias Bickelhaupt
- Department of Theoretical Chemistry, Amsterdam Center for Multiscale Modeling, VU University, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, Fax: +31‐20‐59‐87629
| | - Reinhold Tacke
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg, Germany, Fax: +49‐931‐31‐84609
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18
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Wagler J, Brendler E, Langer T, Pöttgen R, Heine T, Zhechkov L. Ylenes in the M(II)→Si(IV) (M=Si, Ge, Sn) coordination mode. Chemistry 2010; 16:13429-34. [PMID: 21110325 DOI: 10.1002/chem.201002191] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The reaction of the methimazolyl (mt, i.e., 2-mercapto-1-methylimidazolide) substituted silane Si(mt)(4) with SnCl(2) and GeCl(2) in dioxane affords the paddlewheel-shaped complexes [ClSi(μ-mt)(4)MCl] (M=Sn (1) and Ge (2), respectively). These compounds represent the first crystallographically characterized hexacoordinate silicon complexes comprising a Sn or Ge atom in the Si coordination sphere. An attempt to synthesize the related silicon compound 3 [ClSi(μ-mt)(4)SiCl] instead afforded the trisilane [ClSi(μ-mt)(4)Si-SiCl(3)] (3a), which provides the first crystallographic evidence for the feasibility of oligosilanes with adjacent hexacoordinate Si atoms. One of the hexacoordinate Si atoms of 3a features the unprecedented (Si(2)S(4))Si skeleton. Natural bonding orbital (NBO) analyses of compounds 1, 2, 3a (and the target compound 3) revealed characteristics of M(II)→Si(IV) (for 2 and 3) or M(I)→Si(IV) (for 3a) dative bonding in the systems with M=Si and Ge, whereas compound 1 exhibits a covalent Sn(III)-Si(III) bond.
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Affiliation(s)
- Jörg Wagler
- Institut für Anorganische Chemie, TU Bergakademie Freiberg, 09596 Freiberg, Germany.
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19
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Metz S, Theis B, Burschka C, Tacke R. Neutral Pentacoordinate Halogeno- and Pseudohalogenosilicon(IV) Complexes with an SiSONCX Skeleton (X=F, Cl, Br, I, N, C): Synthesis and Structural Characterization in the Solid State and in Solution. Chemistry 2010; 16:6844-56. [DOI: 10.1002/chem.201000152] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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20
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Wagler JÃ, Brendler E. Metallasilatrane: Palladium(II) und Platin(II) als Elektronenpaardonoren für Silicium(IV). Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200905241] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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21
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Metallasilatranes: Palladium(II) and Platinum(II) as Lone-Pair Donors to Silicon(IV). Angew Chem Int Ed Engl 2009; 49:624-7. [DOI: 10.1002/anie.200905241] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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22
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Theis B, Metz S, Burschka C, Bertermann R, Maisch S, Tacke R. Neutral Pentacoordinate Silicon(IV) Complexes with Silicon-Chalcogen (S, Se, Te) Bonds. Chemistry 2009; 15:7329-38. [DOI: 10.1002/chem.200900592] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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24
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Theis B, Metz S, Back F, Burschka C, Tacke R. Neutral Pentacoordinate Silicon(IV) Complexes withSiClO2NC,SiClON2C,SiO3NC, orSiO2N2C Skeletons. Z Anorg Allg Chem 2009. [DOI: 10.1002/zaac.200900108] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Metz S, Burschka C, Tacke R. Synthesis and Structural Characterization of Neutral Hexacoordinate Silicon(IV) Complexes with SiO2N4Skeletons. Chem Asian J 2009; 4:581-6. [DOI: 10.1002/asia.200800405] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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26
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Metz S, Burschka C, Tacke R. Neutral Hexacoordinate Silicon(iv) Complexes with an SiSO3NC Skeleton and a Neutral Pentacoordinate Silicon(iv) Complex Containing a Trianionic Tetradentate O,N,O,O Ligand. Organometallics 2009. [DOI: 10.1021/om801208t] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stefan Metz
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, D-97074 Würzburg, Germany
| | - Christian Burschka
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, D-97074 Würzburg, Germany
| | - Reinhold Tacke
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, D-97074 Würzburg, Germany
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27
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Metz S, Burschka C, Tacke R. A Neutral Pentacoordinate Silicon(IV) Complex with a Monodentate Nitrato Ligand: Synthesis and Structural Characterization. Organometallics 2008. [DOI: 10.1021/om800676a] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stefan Metz
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, D-97074 Würzburg, Germany
| | - Christian Burschka
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, D-97074 Würzburg, Germany
| | - Reinhold Tacke
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, D-97074 Würzburg, Germany
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28
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Metz S, Burschka C, Tacke R. Synthesis and Structural Characterization of Novel Neutral Hexacoordinate Silicon(IV) Complexes with SiS
2
O
2
N
2
Skeletons. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800657] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Stefan Metz
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg, Germany, Fax: +49‐931‐888‐4609
| | - Christian Burschka
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg, Germany, Fax: +49‐931‐888‐4609
| | - Reinhold Tacke
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg, Germany, Fax: +49‐931‐888‐4609
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29
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González-García G, Gutiérrez JA, Cota S, Metz S, Bertermann R, Burschka C, Tacke R. Synthesis and Structural Characterization of Novel Neutral Higher-Coordinate Silicon(IV) Complexes withSiON3C andSiON4C Skeletons. Z Anorg Allg Chem 2008. [DOI: 10.1002/zaac.200700512] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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30
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Theis B, Burschka C, Tacke R. Optically active zwitterionic lambda(5)Si,lambda(5)Si'-disilicates: syntheses, crystal structures, and behavior in aqueous solution. Chemistry 2008; 14:4618-30. [PMID: 18386296 DOI: 10.1002/chem.200701858] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The zwitterionic lambda(5)Si,lambda(5)Si'-disilicates 1-8 were synthesized and characterized by solid-state and solution NMR spectroscopy. In addition, compounds 26 H(2)O, 32 CH(3)CN, 45/2 CH(3)CN, 6CH(3)OH, 7, and 8CH(3)OHCH(3)CN were studied by single-crystal X-ray diffraction. The optically active (Delta,Delta,R,R,R,R)-configured compounds 1-8 contain two pentacoordinate (formally negatively charged) silicon atoms and two tetracoordinate (formally positively charged) nitrogen atoms. One (ammonio)alkyl group is bound to each of the two silicon centers, and two tetradentate (R,R)-tartrato(4-) ligands bridge the silicon atoms. Although these lambda(5)Si,lambda(5)Si'-disilicates contain SiO(4)C skeletons, some of them display a remarkable stability in aqueous solution as shown by NMR spectroscopy and ESI mass spectrometry.
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Affiliation(s)
- Bastian Theis
- Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, Würzburg, Germany
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