Syntheses and NMR studies of mono alkyne complexes of molybdenum and tungsten

Jack L. Davidson, Frederic Sence

Research output: Contribution to journalArticle

Abstract

Reactions of [MCl(CO)(PhCCPh)(?5-C5H5)] (M = Mo, 1a; W, (1b) with TISR (R = ME, Et, nPr, iPr and tBu) give thiolate complexes [MSR(CO)(PhCCPh)(?5-C5H5)] which according to IR and NMR spectroscopy exist in two isomeric forms as a result of restricted rotation about the MSR bond. Reactions of [WCl(CO)(PhCCPh)(?5-C5H5)] and metal salts ML-L, {(ML-L = TlS2-Ph, TlS4-Py. Tlacac, TlOAc, TlS2P(OMe)2} (acac = 2,4-pentanedionato, Py = C5H4N) give similar monoalkyne complexes [WL-L(CO)(PhCCPh)(?5-C5H5)] (3 in which the L-L species functions as a monodentate ligand. In contrast 1a and 1b react with NaS2CNMe2{d2H2O to give carbonylfree derivatives [M(S2CNMe2)(PhCCPh)(?5-C5H5)] containing a bidentate dithiocarbamate ligand. Oxidation of [W{(S2P(OMe)2}(CO)(PhCCPh)(?5-C5H5)] in air gives the oxo complex [W{(S2P(OMe)2}(O)(PhCCPh)(?5-C5H5)], thought to contain a monodentate S2P(OMe)2 ligand. © 1991.

Original languageEnglish
Pages (from-to)219-232
Number of pages14
JournalJournal of Organometallic Chemistry
Volume409
Issue number1-2
Publication statusPublished - 28 May 1991

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