Synthesis, characterisation and electrochemical analysis of a bis(ferrocenyl) vinyl allyl ether-substituted triosmium cluster

Scott L. Ingham, Brian F.G. Johnson, Paul R. Raithby, Kenneth J. Taylor, Lesley J. Yellowlees

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Abstract

From the reaction of [Os3(CO)10(MeCN)2] with ethynylferrocene was isolated the known cluster [Os3(CO)10{(C5H5)FeC 5H4CCH}] 1; in addition the bis(ferrocenyl)-substituted triosmium cluster [Os3(CO)9{[(C5H5)FeC 5H4CCH]2CO}] 2 was obtained in reasonable yield. Both 1H and 13C-{1H} NMR studies of 2 indicate that the ferrocenyl groups are inequivalent. A single-crystal X-ray analysis of 2 showed that on co-ordination to the triosmium cluster the two ethynylferrocene groups have been linked via a metal carbonyl to give a composite ligand that may be described as a 2,6-bis(ferrocenyl) vinyl allyl ether. An electrochemical analysis of the compounds (C5H5)FeC5H4CCH, 1 and 2 reveals reversible one-electron oxidations attributable to the ferrocenyl moiety, with the two well separated redox processes found in 2 indicating inequivalent ferrocenyl sites. In addition, irreversible two-electron cluster-based oxidation processes were observed for 1 and 2.

Original languageEnglish
Pages (from-to)3521-3525
Number of pages5
JournalJournal of the Chemical Society - Dalton Transactions
Volume1996
Issue number17
DOIs
Publication statusPublished - 7 Sep 1996

ASJC Scopus subject areas

  • Chemistry(all)

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