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Alkynyl and poly-ynyl derivatives of carbon-tricobalt clusters |
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| Authors: | Alla B. Antonova Michael I. Bruce Paul A. Humphrey Brian K. Nicholson Brian W. Skelton Natasha N. Zaitseva |
| Affiliation: | a Department of Chemistry, University of Adelaide, Adelaide, SA 5005, Australia b Institute of Chemistry and Chemical Technology, Russian Academy of Sciences, Krasnoyarsk 660049, Russia c Department of Chemistry, University of Waikato, Hamilton, New Zealand d Chemistry M313, SBBCS, University of Western Australia, Crawley, WA 6009, Australia |
| Abstract: | A series of alkynyl-tricobalt carbonyl clusters, Co3(μ3-CnR)(μ-dppm)(CO)7 [R = But, Ph, C6H4I, C6H4C  CPh, SiMe3, Fc, Au(PPh3)] containing three, five or seven carbons in the chain, have been prepared by elimination of phosphine-gold(I) halides in reactions between Co3(μ3-CBr)(μ-dppm)(CO)7 and Au(CCR)(PPh3) or between Co3{μ3-CCCAu(PR3)} (μ-dppm)(CO)7 (R = Ph, tol) and ICCR′ (R′ = SiMe3, Fc). The use of poly-substituted arenes or ferrocenes has enabled preparation of the complexes 1,4-{(OC)7(μ-dppm)Co3 (μ3-CCC)}2C6H3X-5 (X = H, Br), 1,3,5-{(OC)7(μ-dppm)Co3(μ3-CCC)}3C6H3 and 1,1′-{(OC)7(μ-dppm)Co3 (μ3-CCC)}2Fc′ [Fc′ = Fe(η-C5H4-)2]. The X-ray determined molecular structures of 12 of the complexes are reported. |
| Keywords: | Carbon-tricobalt cluster Alkyne Poly-yne X-ray structure Gold |
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