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Semenov, S N; Blacque, O; Fox, T; Venkatesan, K; Berke, H (2010). [W(CO)(dppe)2] cumulenylidene and acetylide complexes accessed via stannylated acetylenes and butadiynes. Organometallics, 29(23):6321-6328.

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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)(N-2)(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 center dot 3H(2)O 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.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
DDC:540 Chemistry
Language:English
Date:2010
Deposited On:23 Feb 2011 16:47
Last Modified:27 Nov 2013 16:35
Publisher:American Chemical Society
ISSN:0276-7333
Publisher DOI:10.1021/om100702x
Other Identification Number:ISI:000284866000022

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