Reactions of low-valent metal complexes with fluorocarbons. Part XXVIII. Nickelocene and tricarbonyl(π-allylic)cobalt complexes with bis(trifluoromethyl)diazomethane

Abstract

Reaction of nickelocene with bis(trifluoromethyl)diazomethane affords a complex which is formulated as a 1 : 2 adduct. A possible structure is discussed. Tricarbonyl(π-vallyl, π-2-methylallyl, or π-1-methylallyl)cobalt react at room temperature with (CF₃)₂CN₂ to form 1:1 adducts [[graphic omitted]:CH₂(CO)₃], [[graphic omitted]:CH₂(CO)₃], [[graphic omitted]CHMe(CO)₃], and [[graphic omitted]CH₂(CO)₃]; the latter is formed as a minor product. Reaction of these species with Ph₃P or Ph₃As leads to displacement of carbon monoxide.