摘要:
The infrared spectra (4000-50 cm(-1)) of the complexes cis-[Rh(CO)(2)(NH3)(X)] (X = Cl, Br) and their (NH3)-N-15, ND3 and (CO)-C-13 isotopomers have been determined. Empirical assignments of the infrared-active modes are based on the frequency shifts caused by selective isotopic substitution experiments. The empirical assignments have been verified by a normal coordinate analysis of the in-plane vibrational modes. The potential energy distribution reveals very little coupling between the normal vibrational modes. However, there exists some coupling between v(RhX) and v(RhC) in the chore complex. (C) 1997 Elsevier Science B.V.