Infrared and Raman spectra of Zn(NH 3) 2Br 2 with 15N and 2H isotopic substitution

Abstract

The infrared and Raman spectra of the Zn(NH 3) 2Br 2 complex in the higher and lowest infrared region (600-40 cm −1) have been assigned by using 15N and 2H isotopic substitution and were compared with the analogous Zn(NH 3) 2Cl 2 complex. The principal ν s(ZnN) ( a 1), ν as(ZnN) ( b 1), ν s(ZnBr) ( a 1) and ν as(ZnBr) ( b 2) stretching and the δ(NZnBr) bending modes were observed. A normal coordinate analysis for the three isotopic compounds has been carried out based on a local symmetry force field (LSFF). The results support the experimental assignments.