ISSN:
0377-0486
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Polarized Raman spectra in the region of the O—H stretches and the decoupled O—D stretches in a crystal of SnCl2 · 2X2O (X = H or D) at room temperature are reported, together with infrared and Raman spectra in the polycrystalline state. Seven decoupled modes for four types of hydrogen bond were observed, which were assigned on the basis of six types of water configuration. A slight shift was found for some bands above 3350 cm-1 on going from the decoupled to the coupled state. The Raman band assigned to the in-phase v1 mode was observed at 3060 (2275) cm-1 in the H (D) system, which was only lower by 89 (54) cm-1 than the decoupled mode. These spectra were analysed on the basis of a force field with intra- and intermolecular interaction constants using 72 water molecules with disorder in the hydrogen positions which satisfy a periodic boundary condition. The observed spectra were essentially explained in terms of the initial set of force constants, except for a medium band at ca. 3200 cm-1, which was accounted for using a shoulder in the decoupled spectra.
Additional Material:
9 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jrs.1250240607
Permalink