Original scientific paper

Infrared Spectra of Rubidium and Cesium Tetrachlorodiaquamanganates. I. Internal Vibrations of Water Molecules

Viktor Stefov ; Department of Chemistry, Faculty of Science, University »Kiril i Metodij«, PO Box 162, 91001 Skopje, Macedonia
Bojan Šoptrajanov ; Department of Chemistry, Faculty of Science, University »Kiril i Metodij«, PO Box 162, 91001 Skopje, Macedonia
Vladimir Petruševski ; Department of Chemistry, Faculty of Science, University »Kiril i Metodij«, PO Box 162, 91001 Skopje, Macedonia

Abstract

Infrared spectra of Rb2[MnCl4(H20)2] and Cs2[MnCL4(H20)2] as well as those of a series of their partially deuterated analogues were recorded at room and at low temperatures (down to the liquid-nitrogen temperature).
The appearance of one single H-O-H bending band in the spectrum of the protiated compounds is in accord with the existence of one single type of water molecules in the structure of the two title compounds. On the other hand, the presence of two H-O-D bending bands in the spectra of the partially deuterated compounds is something that could be expected for water molecules situated on general positions and, thus, possessing two different protons. Finally, the existence of two O-D stretching bands in the spectra of samples with low deuterium content and of two O-H stretching bands in the spectra of the almost completely deuterated samples fits very well in the described picture.
Anharmonicity constants for the isotopically isolated water isotopomers (H2O, HDO and D2O) were calculated.

Keywords

Hrčak ID:

137274

URI

https://hrcak.srce.hr/137274

Publication date:

15.6.1992.

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