Polymerization of isocyanide by multiple insertion into metal-carbon bond

2 Polymerization of isocyanide by multiple insertion into metal-carbon bond 

The insertion ability of isocyanides differs from that of CO. In contrast to the carbon monoxide, for which consecutive CO insertion is disfavored, isocyanides readily undergo the multiple insertion processes especially with more nucleophilic metals such as Ni and Pd (Eq. 7.14). The multiple insertion may lead to new types of organic compounds difficult to prepare by other synthetic methods. 

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