Hydrocarbon alkynes

The reaction of both fluorocarbon and hydrocarbon alkynes with the complexes Co3(CO)gCCH3, Co3(CO)gCCeH5, and C03(CO)gCCO2Me has been investigated 31). The products obtained include substituted benzenes and organocobalt complexes of formula Co2(CO)6(alkyne) and Co2(CO)4(alkyne)3. Treatment of some complexes Co3(CO)gCR with OH in R OH followed by the addition of HX produces Co4(CO)ig-(RC2R) in 15% yield 131a). 

It has been evidenced that among the various unsaturated hydrocarbons, alkynes show the largest inhibiting effect on all oxido-reduction reactions occuring on a PtRh catalyst, i.e. non-alkyne hydrocarbons, CO and NO are not converted until alkynes are eliminated,... 

Barteauwas able to demonstrate for well-defined Ti02 and ZnO surfaces the activity and selectivity for C2 oxygenate (carboxylates and aldehydes) and hydrocarbon (alkynes) coupling reactions over these model metal oxide surfaces under UHV conditions that is typically only seen in organometallic systems in solution. 

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