The complex [Ni(CO)2(PPh3)2], (1), reacts with C2N2 in toluene, at 30.0–44.5 °C, to give trans-[Ni(CN)2(PPh3)2], (2), which crystallizes as a clathrate containing 1 mol of C2N2. The reaction mechanism postulated involves preliminary carbon monoxide dissociation from complex (1), followed by competitive cyanogen attack on the three-co-ordinate [Ni(CO)(PPh3)2] intermediate and subsequent oxidative addition.
M. Basato, B. Corain, G. Favero and P. Rosano, J. Chem. Soc., Dalton Trans., 1984, 2513 DOI: 10.1039/DT9840002513
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