Abstract
Several workers have reported the infrared band positions in the internal mode region of water in CoCl<sub>2</sub> · 2H<sub>2</sub>O and its deuterated analog, but no data are available regarding their bandwidths and intensities, which give essential clues to ascertain the coordination effects in the lattice. In the present work these data have been obtained and the spectra have been discussed in terms of hydrogen bonding and M—O<sub>w</sub> coordination. A simple model is used for estimating the intensity ratio of the ν<sub>1</sub> and ν<sub>2</sub> bands of bound water. In the ν<sub>2</sub> mode the mechanical and electrical anharmonicities have been computed and discussed.
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