Disilicon complexes with two hexacoordinate Si atoms: Paddlewheel-shaped isomers with (CIN4)Si-Si(S4CI) and (CIN2S2)Si-Si(S2N2CI) skeletons

Wagler J, Brendler E, Heine T, Zhechkov L (2013)

Publication Type: Journal article

Publication year: 2013

Journal

Chemistry - A European Journal Wiley

Book Volume: 19

Pages Range: 14296-14303

Journal Issue: 42

DOI: 10.1002/chem.201300452

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 CISi(μ-mt)4 SiCl (mt=methimazolyl). Most interestingly, three isomers (i.e., with (CIN4)Si-Si(S4Cl), (CIN3S)Si-Si(S3NCI), and (CIN2S2)Si-Si(S2N2CI) skeletons as so-called (4,0), (3,1), and cis-(2,2) paddlewheels) were detected in solution by using29Si 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 (CIN2S2)Si-Si(S2N2CI) skeleton to be the most stable. The compounds presented herein are the first examples of crystallographically evidenced disilicon complexes with two Si-Si-bonded octahedrally coordinated Si atoms and representatives of the still scarcely explored class of Si coordination compounds with sulfur donor atoms.

Involved external institutions

Technische Universität Bergakademie Freiberg DE Germany (DE) Jacobs University Bremen gGmbH DE Germany (DE)

How to cite

APA:

Wagler, J., Brendler, E., Heine, T., & Zhechkov, L. (2013). Disilicon complexes with two hexacoordinate Si atoms: Paddlewheel-shaped isomers with (CIN4)Si-Si(S4CI) and (CIN2S2)Si-Si(S2N2CI) skeletons. Chemistry - A European Journal, 19(42), 14296-14303. https://doi.org/10.1002/chem.201300452

MLA:

Wagler, Joerg, et al. "Disilicon complexes with two hexacoordinate Si atoms: Paddlewheel-shaped isomers with (CIN4)Si-Si(S4CI) and (CIN2S2)Si-Si(S2N2CI) skeletons." Chemistry - A European Journal 19.42 (2013): 14296-14303.

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