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Raman spectra of Na 3 AsS 4 ·8(D, H) 2 O and Na 3 SbS 4 ·9(D, H) 2 O and OD(H)…S bonds in salt hydrates
Author(s) -
Mikenda W.,
Steidl H.,
Preisinger A.
Publication year - 1982
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.1250120303
Subject(s) - raman spectroscopy , chemistry , hydrogen bond , spectral line , analytical chemistry (journal) , crystallography , proton , molecule , physics , optics , organic chemistry , chromatography , quantum mechanics , astronomy
Raman spectra, measured in the temperature range T =75–295 K, are reported for H 2 O, D 2 O and isotopically dilute samples of Na 3 AsS 4 ·8(D, H) 2 O and Na 3 SbS 4 ·9(D, H) 2 O. At T =75 K the uncoupled OD(H) stretching frequencies are observed in the range ν = 2433–2664(3279–3618) cm −1 and ν = 2461–2528(3318–3417) cm −1 for the thioarsenate and the thioantimonate, respectively. Plausible assignments to the distinct crystallographically non‐equivalent OD(H) groups are given. The correlation between the uncoupled OD stretching frequencies and the hydrogen bond distances R (D…S) of approximately linear OD…S bonds in salt hydrates is discussed. The frequency shifts upon H‐bond formation are shown to depend strongly on the chemical nature of the sulphur proton acceptors.