Abstract

A novel, 65-electron tetranuclear nickel cluster of the formula Cp 3Ni 4(CH 3CCCH 3) 3 ( 6) was isolated and identified as the product of the reaction of nickelocene with methyllithium in the presence of 2-butyne at the molar ratio of reactants 1:1:1. The compound was fully characterised by spectroscopic and X-ray measurements. It crystallises from hexane in an orthorhombic crystal system and space group Pbcn. Corresponding unit cell parameters were determined as a=26.438(5), b=11.219(2), c=16.328(3) Å; α= β=γ=90°; V=4843(2) Å 3; Z=8.

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