Oligomerisation of alkynes at a pentamethylcyclopentadienylruthenium centre

Michael I. Bruce; Ben C. Hall; Brian W. Skelton; Allan H. White; Natasha N. Zaitseva

doi:10.1039/B001981J

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Oligomerisation of alkynes at a pentamethylcyclopentadienylruthenium centre†

Michael I. Bruce,*^a Ben C. Hall,^a Brian W. Skelton,^b Allan H. White^a and Natasha N. Zaitseva^a

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* Corresponding authors

^a Department of Chemistry, University of Adelaide, Adelaide, South Australia, Australia
E-mail: michael.bruce@adelaide.edu.au

^b Department of Chemistry, University of Western Australia, Nedlands, Western Australia, Australia

Abstract

Reactions between the neutral vinylidene RuCl( [double bond, length half m-dash] CCHPh)(PPh₃)Cp* 2 and AgC [triple bond, length as m-dash] CCO₂Me gave Ru{η¹-C(CCPh) CHC(O)OMe-O}(PPh₃)Cp* 3, while either LiCCPh or HCCPh/NaOMe afforded the known Ru{η³-PhCHCHC CPh(CCPh)}(PPh₃)Cp* 1. Similarly, RuCl{CCH(CO₂Me)}(PPh₃)Cp* 4 reacted with HCCPh/NaOMe to give Ru{η³-CH(CO₂Me)CHC [double bond, length half m-dash] CPh(C [triple bond, length as m-dash] CCO₂Me)}(PPh₃)Cp* 5. Complex 3 reacted with HCCCO₂R (R = Me or Et) to give the 1,3,4,5-tetraen-1-yls Ru{η¹,η²-C(CO₂R)CHCPhCCCH(CO₂Me)}(PPh₃)Cp* (R = Me 6 or Et 7)] and with HCCSiMe₃ to give a mixture of Ru{η³-CH(CO₂Me)C(CH [double bond, length half m-dash] CHSiMe₃)CCPhC [triple bond, length as m-dash] CSiMe₃}(PPh₃)Cp* 8 and Ru{η³-CH(CO₂Me)CHCCPh(CCSiMe₃)}(PPh₃)Cp* 9. Crystal structures of 1, 3 and 5–8 were determined. These reactions provide routes to the stepwise formation of novel non-cyclic oligomers of 1-alkynes, with 8 containing the first example derived from four alkynes.

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Supplementary files

Crystal structure data TXT (375K)

Article information

DOI: https://doi.org/10.1039/B001981J
Article type: Paper
Submitted: 13 Mar 2000
Accepted: 04 May 2000
First published: 21 Jun 2000

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J. Chem. Soc., Dalton Trans., 2000, 2279-2286

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Oligomerisation of alkynes at a pentamethylcyclopentadienylruthenium centre

M. I. Bruce, B. C. Hall, B. W. Skelton, A. H. White and N. N. Zaitseva, J. Chem. Soc., Dalton Trans., 2000, 2279 DOI: 10.1039/B001981J

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Journal of the Chemical Society, Dalton Transactions

Oligomerisation of alkynes at a pentamethylcyclopentadienylruthenium centre†

Abstract

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Oligomerisation of alkynes at a pentamethylcyclopentadienylruthenium centre

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