Preparation of bis(¿6-2-R-benzo[b]thiophene)-chromium and -molybdenum (R = H, Me, SiMe3) sandwich complexes via metal vapour synthesis. Crystal structure of [Cr(¿6-2-Me C8H5S)2]

Burton, N C, Cloke, N Geoffrey F, Hitchcock, P B, Mepsted, G O, Newton, C and Patel, H (1995) Preparation of bis(¿6-2-R-benzo[b]thiophene)-chromium and -molybdenum (R = H, Me, SiMe3) sandwich complexes via metal vapour synthesis. Crystal structure of [Cr(¿6-2-Me C8H5S)2]. Journal of Organometallic Chemistry, 494 (1-2). pp. 241-246. ISSN 0022328X

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Abstract

Co-condensation of chromium atoms with benzo[b]thiophene, 2-methylbenzo[b]thiophene or 2-trimethylsilylbenzo[b]thiophene at 77 K yields the sandwich complexes [Cr(¿6-C8H6S)2] (1), [Cr(¿6-2-MeC8H5S)2] (2) and [Cr(¿6-2-SiMe3C8H5S)2] (3). The molybdenum complex [Mo(¿6-2-MeC8H5S)2] (4) was prepared analogously. Complexes 1, 2 and 4 exist as a mixture of diastereoisomers as indicated by 1H and 13C NMR spectroscopy, with mesomeric and racemic forms present in the ratios 1:1 for 1 and 1:2 for 2 and 4. The mesomeric form of complex 2 was also studied by single-crystal X-ray diffraction which confirmed ¿6-ligation of the arene function of both 2-methylbenzo[b]thiophene rings.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Depositing User: Geoff Cloke
Date Deposited: 06 Feb 2012 18:23
Last Modified: 16 Mar 2012 16:17
URI: http://sro.sussex.ac.uk/id/eprint/16062
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