Abstract
The reaction of the cluster Os 3(CO) 10(μ-H)(μ-γ-C 5H 3O 2) ( 1) with a number of alkynes under thermal or visible light irradiation conditions, afforded in most cases the dinuclear complexes Os 2(CO) 6(μ-γ-C 5H 3O 2)(μ-LH) (L=PhCCPh, t BuCCH, t BuCCMe or EtCCEt) ( 2) or the trinuclear chain complexes Os 3(CO) 9(μ-H)(μ-γ-C 5H 3O 2)(μ-RCCHC 6H 4) (R=H, Ph) ( 3). In the case of PhCCPh, a new isomer of Os 3(CO) 8(PhCCPh) 2, viz., Os 3(CO) 8(μ-PhCCPh)(μ-PhCCHC 6H 4) ( 7) has been isolated and characterised.
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