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Spectroscopic study of [Me(NH 3 ) 6 ]X 2 compounds. I‐Raman study of phase transitions in [Ni(NH 3 ) 6 ](ClO 4 ) 2 and [Ni(ND 3 ) 6 ](ClO 4 ) 2
Author(s) -
Janik J. A.,
Sarga T.,
Janik J. M.,
Pytasz G.,
Sokotowski J.
Publication year - 1977
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250060306
Subject(s) - raman spectroscopy , analytical chemistry (journal) , crystallite , ion , chemistry , phase transition , phase (matter) , inorganic compound , spectral line , crystallography , condensed matter physics , physics , optics , chromatography , astronomy , organic chemistry
Temperature dependence of Raman spectra was measured for polycrystalline [Ni(NH 3 ) 6 ](ClO 4 ) 2 and [Ni(ND 3 ) 6 ](ClO 4 ) 2 . Spectroscopic evidence for the phase transition at 173 K was obtained. The phase transition is evident in the splitting of some bands corresponding to the internal ClO − 4 ion vibrations and in charactreistic intensity dependences of the bands. Some bands also showed a characteristic broadening with increasing temperature, which we interpret as being connected with stochastic reorientations of NH 3 groups and ClO − 4 ions. Two bands which were not resolved from the others at the room temperature study 1 were now evidenced at low temperatures.