Fig. 1. (A) IR spectra for the transformation of complex 2 to [NiII(CO)(PS3)]– in THF. The decrease in the intensity of the IR νCO2 peak at 2226 cm–1 exhibited by complex 2 with the simultaneous formation of an IR νCO peak at 2027 cm–1 indicated the formation of complex [NiII(CO)(PS3)]–. (B) GC chromatogram, derived from the sample collected from the headspace of the tube containing the reaction solution of complex 2 and CO(g), indicating the release of CO2(g) during the transformation of complex 2 to [NiII(CO)(PS3)]–.
