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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 contribution
posted on 2023-06-07, 19:48 authored by N C Burton, Geoff Cloke, P B Hitchcock, G O Mepsted, C Newton, H Patel
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.

History

Publication status

  • Published

Journal

Journal of Organometallic Chemistry

ISSN

0022328X

Issue

1-2

Volume

494

Page range

241-246

Department affiliated with

  • Chemistry Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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