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Raman spectrum of guanidinium aluminium sulphate hexahydrate

  • R. S. Krishnan
  • P. Neelakantan
Article

6. Summary

The Raman spectrum of guanidinium aluminium sulphate hexahydrate also known as ‘GASH’ which is a ferro-electric crystal and has strong hydrogen bonds has been recorded. 38 Raman lines have been identified in the spectra of GASH. The O-H stretching mode is found to be very much influenced by the hydrogen bond and they appear over a widely extended region from 2240–3600 cm.−1 It can therefore be concluded that all the O-H bonds are hydrogen bonded and some of them are quite strong. The Raman lines due to the N-H vibrations appear with the normal frequency shifts indicating thereby that N-H bonds are not hydrogen bonded. These conclusions are fully supported by the results obtained from the X-ray crystal structure analysis of GASH. The principal vibrations of the Al-(OH2)6 groups have also been identified.

Keywords

Raman Spectrum Frequency Shift Guanidinium Rabie Raman Line 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Indian Academy of Sciences 1965

Authors and Affiliations

  • R. S. Krishnan
    • 1
  • P. Neelakantan
    • 1
  1. 1.Department of PhysicsIndian Institute of ScienceBangalore-12

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