The crystal structure and vibrational analyses of melamine hydrobromide by FTIR and FT- Raman spectra, are presented. The crystallographic data show π-electron delocalization towards the amino substituents with ring nitrogen protonation in the solid state. Additionally, the presence of intermolecular hydrogen bonding interactions occurring between amino substituents and ring nitrogen lone-pairs gives rise to charge-transfer complexes, as demonstrated by UV-VIS reflectance in the solid state. FTIR and FT-Raman spectra allow the assignments of the vibrational modes in melamine hydrobromide by comparison with the corresponding deuteriated molecules, and show the existence of iso-melamine cations in the solid state.

Crystal Structure and Spectroscopic Analysis of Melamine Hydrobromide. Evidence for iso-Melamine Cations and Charge-Transfer Complexes in the Solid State

SCOPONI, Marco;POLO, Eleonora;BERTOLASI, Valerio;CARASSITI, Vittorio;
1992

Abstract

The crystal structure and vibrational analyses of melamine hydrobromide by FTIR and FT- Raman spectra, are presented. The crystallographic data show π-electron delocalization towards the amino substituents with ring nitrogen protonation in the solid state. Additionally, the presence of intermolecular hydrogen bonding interactions occurring between amino substituents and ring nitrogen lone-pairs gives rise to charge-transfer complexes, as demonstrated by UV-VIS reflectance in the solid state. FTIR and FT-Raman spectra allow the assignments of the vibrational modes in melamine hydrobromide by comparison with the corresponding deuteriated molecules, and show the existence of iso-melamine cations in the solid state.
1992
Scoponi, Marco; Polo, Eleonora; F., Pradella; Bertolasi, Valerio; Carassiti, Vittorio; P., Goberti
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1410667
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