Reactions of Ru(C≡CPh)(L₂)Cp* (L₂ = dppm, dppe) with tetracyanoethene: cycloaddition, formation of monodentate dppm and dppmO complexes and migration of CN to ruthenium
Date
2002
Authors
Bruce, M.
Skelton, B.
White, A.
Zaitseva, N.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Journal of Organometallic Chemistry, 2002; 650(1-2):141-150
Statement of Responsibility
Michael I. Bruce, Brian W. Skelton, Allan H. White and Natasha N. Zaitseva
Conference Name
Abstract
The reaction of C<inf>2</inf>(CN)4 with Ru(C≡CPh)(dppm)Cp* in THF has given the anticipated tetracyanobuta-1,3-dien-2-yl complex Ru{C[=C(CN)<inf>2</inf>]CPh=C(CN)<inf>2</inf>}(dppm)Cp* (3). In benzene, η<sup>3</sup>-cyano-enyl complexes complex 3 rearranges to the cyanoruthenium-ylid complex Ru(CN){C(CN)=C[CPh=C(CN)<inf>2</inf>]PPh<inf>2</inf>CH<inf>2</inf>PPh <inf>2</inf>}Cp* (6). A possible reaction sequence, involving a zwitterionic intermediate such as Ru(δ-)(CN){C(CN)C(δ+)CPh=C(CN)<inf>2</inf>}(dppm-P)Cp* D, is discussed. Only the η<sup>1</sup>-dienyl complex 7 is obtained from Ru(C≡CPh)(dppe)Cp* and TCNE. © 2002 Published by Elsevier Science B.V.