Infrared studies of the phase transitions of alkylammonium halides, RNH3X, and bis-(alkylammonium) tetrahalogenometallates(II), (RNH3)2MX4, (R = alkyl, M = metal, X = Cl or Br)

C. N. R. Rao; Somnath Ganguly; H. Ramachandra Swamy; Ian A. Oxton

doi:10.1039/F29817701825

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Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics

Issue 10, 1981

Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics was published from 1972 - 1989. In 1990 it continued as Journal of the Chemical Society, Faraday Transactions.

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Infrared studies of the phase transitions of alkylammonium halides, RNH₃X, and bis-(alkylammonium) tetrahalogenometallates(II), (RNH₃)₂MX₄, (R = alkyl, M = metal, X = Cl or Br)

C. N. R. Rao, Somnath Ganguly, H. Ramachandra Swamy and Ian A. Oxton

J. Chem. Soc., Faraday Trans. 2, 1981,77, 1825-1836

DOI: 10.1039/F29817701825

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Internal vibration modes of bis-(alkylammonium) tetrachlorometallates(II) and the corresponding alkylammonium chlorides have been studied through their phase transitions using infrared spectroscopy. The studies show that the vibrational states of alkylammonium ions change markedly through the phase transitions. Spectra of the analogous tetrabromometallates and alkylammonium bromides also confirm this behaviour. There is appreciable motion of the alkylammonium ions in the high-temperature phases; thus, CH₃NH⁺₃ ions are essentially undistorted in these phases. The low-temperature, ordered phases show evidence of stronger hydrogen bonding of the cations and for the presence of C—N torsional modes.

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Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics

Infrared studies of the phase transitions of alkylammonium halides, RNH₃X, and bis-(alkylammonium) tetrahalogenometallates(II), (RNH₃)₂MX₄, (R = alkyl, M = metal, X = Cl or Br)

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Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics

Infrared studies of the phase transitions of alkylammonium halides, RNH3X, and bis-(alkylammonium) tetrahalogenometallates(II), (RNH3)2MX4, (R = alkyl, M = metal, X = Cl or Br)

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Infrared studies of the phase transitions of alkylammonium halides, RNH₃X, and bis-(alkylammonium) tetrahalogenometallates(II), (RNH₃)₂MX₄, (R = alkyl, M = metal, X = Cl or Br)