Alkyl and hydrido derivatives of tetrakis(trimethylphosphine)osmium(II). X-Ray crystal structure of the metallacycle Os[(CH2)2SiMe2](PMe3)4

Torsten Behling, Gregory S Girolami, Geoffrey Wilkinson, Richard G. Somerville, Michael B. Hursthouse

Research output: Contribution to journalArticlepeer-review

Abstract

The interaction of the osmium acetato-complexes trans-OsII(O2CMe)2(PMe3)4 and OsIII2Cl2(μ-O2CMe)4 with alkylating agents in the presence of trimethylphosphine has led to the isolation of cis-OsMe2(PMe3)4, Os[(CH2)2SiMe2](PMe3)4, OsCl(CH2PMe2)(PMe3)3, and Os(CH2C6H4)(PMe3)4. The hydride cis-OsH2(PMe3)4 has been obtained from K2[OsO2(OMe)4] by interaction with PMe3 and methanol. The 1H, 13C-{1H}, and 31P-{1H} n.m.r. spectra of the compounds are discussed. The X-ray crystal structure of the metallacycle Os[(CH2)2SiMe2](PMe3)4 has been determined, and the [graphic omitted] ring found to be flat. The Os-C distances are 2.24(1) Å, while the Os-P distances of 2.32 (trans to C) and 2.35 Å (trans to P) indicate the trans influence of the metallacyclobutane is low compared to that of the σ alkyl groups.

Original languageEnglish (US)
Pages (from-to)877-881
Number of pages5
JournalJournal of the Chemical Society, Dalton Transactions
Issue number5
DOIs
StatePublished - Dec 1 1984
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)

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