Synthesis of Metal Carbodiimide Adducts

The reaction of a variety of liganded metal derivatives with carbodiimides give [1+2] or [2+2] cycloadducts or more complicated products resulting from rearrangement or reductive coupling reactions. Also, amidinate complexes, which are sometimes obtained in the reaction of metal complexes with carbodiimides, are included. 

In Table 10.1 some of the [1+2] cycloaddition products obtained from liganded metal compounds and carbodiimides are listed. 

In the reaction of DIPCD with (CO)5 V CRPh 33 a [2+2] cycloaddition acrosss the W=C bond is observed to give the four membered ring cycloadduct 34.  

in the reaction of Na[CpFe(CO)2] with diphenylcarbodiimlde, [2+2] addition across the iron-carbon is observed.  

Lithium N,N -diorganoamidinates 35 are obtained in the reaction of phenyl lithium with DCC or DIPCD.5  

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