The preparation and characterisation of monomeric and linked metal carbonyl clusters containing the closo-Si2Co4 pseudo-octahedral core

Evans, Cameron; Harfoot, Gwion J.; McIndoe, J. Scott; McAdam, C. John; Mackay, Kenneth M.; Nicholson, Brian K.; Robinson, Brian H.; Van Tiel, Martin L.

doi:10.1039/b208374b

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Evans, C., Harfoot, G.J., McIndoe, J.S., McAdam, C.J., Mackay, K.M., Nicholson, B.K., Robinson, B.H. & Van Tiel, M.L. (2002). The preparation and characterisation of monomeric and linked metal carbonyl clusters containing the closo-Si2Co4 pseudo-octahedral core. Dallton Transactions, 4678-83.

Permanent Research Commons link: https://hdl.handle.net/10289/127

Abstract

PhSiH3 reacts with [Co₄(CO)₁₂] at 50 °C in hydrocarbon solvents to give [(µ₄-SiPh)₂Co₄(CO)₁₁], 2c, shown by an X-ray crystal structure determination to have a pseudo-octahedral Si₂Co₄ core. Substituted aryl-silanes behaved similarly. Mixtures of PhSiH₃, H₃SiC₆H₄SiH₃ and [Co₄(CO)₁₂] in a ca. 2 1 2 ratio gave the dimeric cluster [{Co₄(µ₄-SiPh)(CO)₁₁Si}₂C₆H₄], 3a, which has the two Si₂Co₄ cores linked by a C₆H₄ group to give a rigid molecule which an X-ray structure analysis shows to be over 23 Å long. Related dimers linked by –(CH₂)₈– groups were isolated from mixtures of PhSiH₃, α ,ω-(H₃Si)₂(CH₂)₈ and [Co₄(CO)₁₂]. Electrochemical studies show the two cluster units in 3a do not interact electronically.

Date

2002-01-01

Type

Journal Article

Publisher

Royal Society of Chemistry

Rights

This is the authors version of an article published in the, Journal of the Chemical Society, Dalton Transactions, (c) The Royal Society of Chemistry 2002, at the Dalton Transactions webpage.

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Science and Engineering Papers [3124]