VIBRATIONAL SPECTRA OF THE TRIAMINOGUANIDINIUM AND TRIMETHYLGUANIDINIUM IONS

Author Institution: Research and Development Department, U. S. Naval Propellant PlantInfrared and Raman spectra have been measured in solution and crystalline phases for the triaminoguanidinium ions, $(NH_{2}NH)_{3}C^{+}$ and $(ND_{2}ND)_{3}C^{+}$, and the trimethylguanidinium ions, $(CH_{3}NH)_{3}C^{+}$ and $(CH_{3}ND)_{3}C^{+}$ The spectral data support a $C_{ah}$ planar configuration for these ions. A strong interaction between the methyl bending and in-plane NH wagging modes has been found for the trimethylguanidinium ion which has not been noted for other molecules containing the $CH_{3}NH$ grouping