Vibrational spectra and normal coordinate analysis of diamminediiodidezinc(II) with 15N and 2H isotopic substitution.

The Raman and IR, spectra of solid diamminediiodidezinc (II) with N-15 and H-2 isotopic substitution have been measured. The spectra have been interpreted assuming C-2v symmetry for the Zn(NH3)(2)I-2 complex structure. The skeletal stretching metal-ligand modes nu(s)(ZnN), nu(as)(ZnN),nu s(ZnI),nu(as)(ZnI) as well as the three bending modes delta(NZnN), delta(IZnI) and delta(IZnN) were assigned by comparison with the spectra of Zn(NH3)(2)C1(2) and Zn(NH3)(2)Br-2, and by the observed isotopic shifts of the frequencies. A normal coordinate analysis for the whole complex was carried out using the Local Symmetry Force Field Model.