Organometallic compounds nickel insertion reactions

CO reacts imder normal conditions of pressure and temperature with some nickel(II) organometallic compounds and an insertion reaction into the original Ni—C a bond results (equations 156-158).1201,1236,1247-1249 A different example of an insertion reaction of CO is reported in equation (159).1250... 

The reaction of CO with some of the preceding organometallic compounds is rapid at room temperature and pressure and insertion of CO into the Ni—C bond results (equation 175).1445 In the case of the np3 ligand the first product isolated is a solid solution of the acyl derivative of nickel(II), [Ni(COR)(np3)]+, and a carbonyl complex of nickel(I), [Ni(CO)(np3)]+, in a 1 1 ratio. When this solid solution is dissolved in THF and EtOH, the pure acyl derivative (190) resulted. The acetyl derivative spontaneously loses CO on exposure to air restoring the original methyl derivative. 

To enhance understanding of the CO-olefin copolymerization reaction catalyzed by nickel organometallic complexes (for the similar copolymerization reaction catalyzed by palladium compounds, see below), consider the carbon monoxide insertion reaction with nickel(II) compounds containing the bidentate P, O donor B ... 

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