Cumulenylidene and acetylide complexes accessed via stannylated acetylenes and butadiynes

Sergey N. Semenov, Olivier Blacque, Thomas Fox, Koushik Venkatesan, Heinz Berke*

*Corresponding author for this work

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The tungsten butatrienylidenes [cis-W(CO)(dppe)2{C=C=C=C(R) (SnMe3)}] (R = SnMe3 (2) and SiMe3 (3); dppe = 1,2-bis(diphenylphosphinoethane)) were prepared from the reactions of [trans-W(CO)(N2)(dppe)2] (1) and the respective butadiynes displaying a 1,4-shift of the respective SnMe3 groups along the butadiyne chains. Stannyl deprotection of 2 with NBu4F·3H 2O led to the anionic butadiyne derivative [trans-W(CO)(dppe) 2(C≡CC≡CH)][NBu4] (10). The reaction of 1 with stannylated acetylenes gave the vinylidene derivatives [cis-W(CO)(dppe) 2{C=C(SnMe3)(R)}] (R = Ph (5) or SnMe3 (6)), which lost a SnMe3 group, yielding W(I) acetylides of the type [trans-W(CO)(dppe)2(C≡CR)] (R = Ph (7), SnMe3 (8), and SiMe3 (9)). They were studied by cyclic voltammetry and EPR spectroscopy.

Original languageEnglish
Pages (from-to)6321-6328
Number of pages8
JournalOrganometallics
Volume29
Issue number23
DOIs
Publication statusPublished - 13 Dec 2010
Externally publishedYes

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