Addition of hexafluorobut-2-yne to co-ordinated 1,3-dienes; crystal structures of the adducts [Ru(CO)2{P(OCH2)3CMe}(C6H8)(C4F6)2] and [Fe(CO)2{P(OCH2)3CMe}(C7H8)(C4F6)2]

Abstract
Hexafluorobut-2-yne forms 1 : 1 adducts with tricarbonyl(butadiene or 2,3-dimethylbutadiene)iron and tricarbonyl-(o-styryldiphenylphosphine)iron, whereas tri-carbonyl(cyclohexa-1,3-diene)-iron and -ruthenium, and tricarbonyl(cycloheptatriene)iron form unusual 1 : 2 adducts identified by X-ray crystallography.

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