Preparation of cyclic and acyclic thioethers via hexacarbonyldicobalt alkyne complexes

Mohmand, G.F. and Thiele, K. and Went, M.J. (1994) Preparation of cyclic and acyclic thioethers via hexacarbonyldicobalt alkyne complexes. Journal of Organometallic Chemistry, 471 (1-2). pp. 241-248. ISSN 0022-328X. (The full text of this publication is not available from this repository)

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Abstract

Demetallation of [Co2{mu-C2(CH2SCH2CH2)2S}(CO)6] with trimethylamine N-oxide affords 1,4,7-trithiacycloundec-9-yne, while similar treatment of [Co2(CO)6{mu-(CCH2SCH2CH2SCH2CH2SCH2C)2}Co2(Co)6] affords 1,4,7,12,15,18-hexathiacyclodocos-9,2-diyne. 20-diyne. A single crystal X-ray diffraction study and H-1 NMR spectroscopy have confirmed that 1,4,7-trithiacycloundec-9-yne adopts an exodentate conformation in the solid and solution states. Trimethylamine N-oxide promoted Pauson-Khand reactions of [Co2(mu-R1C = CCH2SR2)(CO)6] (R1 = H, R2 = Et; R1 = Me, R2 = Et) or [Co2(mu-RSCH2=CCH2SR)(CO)6] (R = Et; R-R = CH2CH2, CH2CH2CH2 or CH2CH2SCH2CH2) with norbornene or of [Co2(mu-R1C=CCH2SR2)(CO)6] (R1 = H, R2 = Et; R1 = Me, R2 = Et) with norbornadiene afford a range of cyclopentenone products, which have been characterised by NMR, IR and mass spectroscopy.

Item Type: Article
Uncontrolled keywords: cobalt; alkyne; macrocycle; thioether; pauson-khand reaction; cyclopentenone
Subjects: Q Science > QD Chemistry
Divisions: Faculties > Science Technology and Medical Studies > School of Biosciences
Depositing User: O.O. Odanye
Date Deposited: 06 Jul 2009 18:19
Last Modified: 06 Jul 2009 18:19
Resource URI: http://kar.kent.ac.uk/id/eprint/19916 (The current URI for this page, for reference purposes)
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