Co-ordinatively unsaturated alkyne complexes of molybdenum and tungsten. Reactions of [MCl(CF3C=CCF3)2(η-C5H 5)] (M = Mo or W) with heterocyclic thiolates leading to η2-vinyl complexes

Jack L. Davidson, I. E P Murray, Peter N. Preston, Maria V. Russo

Research output: Contribution to journalArticle

Abstract

Reactions of Tl(SR) (SR- = pyridine-2-thiolate, pyrimidine-2-thiolate, or thiazoline-2-thiolate) with the bis(hexafluorobut-2-yne) complex [MoCl(CF3C=CCF3)2(?-C5H 5)] give products [Mo{C(CF3)-C(CF3)RS}(CF3C=-CCF 3)(?-C5H5)] containing a novel ?2-vinyl ligand resulting from nucleophilic attack of nitrogen on a co-ordinated alkyne. The same pyridine-2-thiolate complex is obtained from the reaction of [MoCl(CF3C=CCF3)2(?-C5H 5)] with the thallium(I) salt of 2-mercaptopyridine N-oxide, in addition to [Mo{C(CF3)=C(CF3)C(CF3)=C(CF 3)SC5H4NO}(?-C5H5)]. The complex [WCl(CF3C=CCF3)2(?-C5H 5)] reacts with thallium(I) pyridine-2-thiolate to give the ?2-vinyl complex [W{C(CF3)-C(CF3)NC5H4S}(CF 3C=CCF3)(?-C5H5)], whereas with Tl(SC5H4NO) cyclopentadienyl-ligand displacement is also observed giving the co-ordinatively unsaturated bis(hexafluorobut-2-yne) complexes [W(SC5H4NO)2(CF3C=CCF 3)2] and [W(SC5H4N) (SC5H4NO)(CF3C=CCF3)2].

Original languageEnglish
Pages (from-to)1783-1787
Number of pages5
JournalJournal of the Chemical Society, Dalton Transactions
Issue number8
DOIs
Publication statusPublished - 1983

Fingerprint Dive into the research topics of 'Co-ordinatively unsaturated alkyne complexes of molybdenum and tungsten. Reactions of [MCl(CF<sub>3</sub>C=CCF<sub>3</sub>)<sub>2</sub>(η-C<sub>5</sub>H <sub>5</sub>)] (M = Mo or W) with heterocyclic thiolates leading to η<sup>2</sup>-vinyl complexes'. Together they form a unique fingerprint.

Cite this