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Raman and infrared spectra of NH4H2(IO3)3 and KH2(IO3)3

โœ Scribed by N. Santha; M. Isaac; V. U. Nayar; G. Keresztury

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
217 KB
Volume
22
Category
Article
ISSN
0377-0486

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โœฆ Synopsis

Abstract

Raman and infrared spectra of NH~4~H~2~(IO~3~)~3~ and KH~2~(IO~3~)~3~ were recorded and analysed. The observed splittings of the stretching modes of IO~3~^โˆ’^ are due to the distortion of the IO~6~ octahedra. In NH~4~H~2~(IO~3~)~3~, the ammonium ion can rotate freely and the NH~4~^+^ group forms only weak hydrogen bonds with the oxygen atom. Owing to Fermi resonance, three stretching bands are observed for the OH vibration in both compounds. The hydrogen bonds are slightly shorter in KH~2~(IO~3~)~3~ than in NH~4~H~2~(IO~3~)~3~.

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โœ P. Rajagopal; G. Aruldhas ๐Ÿ“‚ Article ๐Ÿ“… 1988 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 161 KB

Infrared and polarized Raman spectra of (NH4)JH(S04)1 have been recorded and analysed. Multiple bands are observed for the vibrational modes of SO:-and NH: groups. HSO; and SO:-ions are found to coexist with vibrational interaction between them. NH: ion is not rotating freely in the lattice.