Vibrational Spectrum of Nickel Carbonyl

The infrared absorption spectrum of Ni(CO)4 has been studied in the liquid and gaseous states. As a result of the observations certain frequency assignment changes have been made. The most probable assignment of fundamental frequencies appears to be 2128 and 381 for the A1 species; 461 and 79 for the E species; 2057, 459, 422, and 79 for the F2 species; and 300 cm—1 for the F1 species. Using these values a normal coordinate treatment was carried out. Though the solution is not unique we can report FCO = 17.3±0.4 md/A and FNiC≈2.1 md/A.