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

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

Open Access

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

Author(s) -

Cameron Evans,

Gwion J. Harfoot,

J. Scott McIndoe,

C. John McAdam,

Kenneth M. Mackay,

Brian K. Nicholson,

Brian H. Robinson,

M.L. Van Tiel

Publication year - 2002

Publication title -

journal of the chemical society dalton transactions

Language(s) - English

Resource type - Journals

eISSN - 1472-7773

pISSN - 1364-5447

DOI - 10.1039/b208374b

Subject(s) - chemistry , octahedron , silanes , molecule , monomer , cluster (spacecraft) , aryl , crystallography , group (periodic table) , rhenium , metal , crystal structure , stereochemistry , inorganic chemistry , organic chemistry , silane , alkyl , computer science , programming language , polymer

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

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