Heterionic vibrational coupling in crystalline methylammonium nitrate

Upali A. Jayasooriya, Sidney F.A. Kettle, Richard Mortimer, Juergen Eckert, Nancy K. McGuire

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Heterionic vibrational coupling is shown to exist between the CH3 and NH3 deformation modes of the monomethylammonium cation and the antisymmetric stretching mode, ν(N-O), of the nitrate anion in the salt monomethylammonium nitrate in the solid state. It is concluded that neither a dipole-dipole nor a hydrogen-bonding mechanism separately provides an adequate explanation of these couplings. A clear relationship between the spectra and crystal pseudosymmetry is also shown to exist.

Original languageEnglish
Pages (from-to)1631-1636
Number of pages6
JournalJournal of the Chemical Society, Faraday Transactions
Issue number12
StatePublished - 1992


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