Reactions of phosgene with transition metal organometallics

2 Reactions of phosgene with transition metal organometallics 

Treatment of a hexane solution of [Cr(CO)5 PH[N(CHMe2)j]j ] with phosgene, both at room temperature and under reflux, resulted (rather surprisingly) in the chromium(O) complex being recovered unchanged [1107ac]. 

In a recent fascinating publication, pentacarbonyl(methoxyphenylcarbene)tungsten(0), [W(CO)5 C(OMe)Ph ], was treated with phosgene in octane in a sealed tube at 70 C this reaction produced a mixture of methyi benzoate, PhC(0)0Me, and tetrachloroethene [1143]. The proposed mechanism, aithough tentative, is of some interest, as it involves initial coordination of the phosgene, and then oxygen loss to form a dichlorocarbene ligand [1143]  

Organomanganese(II) halides react with phosgene in diethyl ether (-40 - +20 C) in a predictable manner [323]  

Metal carbamoyl complexes can readily be converted into isonitrile complexes with phosgene (in the presence of NEtj), a procedure which can be utilized to prepare complexes of isonitriles which do not exist in the free state [635]  

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