Solid-state vibrational spectroscopy: Part 11. An infrared and raman vibrational spectroscopic study of metal(II) halide aniline complexes

Abstract

Infrared (4000−200 cm−1) and Raman (3500−50 cm−1) spectra are reported for metal(II) halide aniline complexes of the following stoichiometries: (MX2an2) (M  Co, Ni or Hg, X  Cl; M  Mn, X  Cl or Br; M  Zn or Cd, X  Cl, Br or I); (MX2an3) (M  Mn, X  Cl or Br; M  Ni, X  Cl); (CdCl2an) and an assignment is proposed for all the observed bands. Low-temperature (83 K) IR spectra are also reported and it is noted that whilst the aniline ring and CH mode values are virtually insensitive to temperature, the NH2 rocking and metal-ligand stretching mode values increase with decreasing temperature, whilst the NH2 stretching mode values decrease with decreasing temperature.