Vibrational study of methylamine dimer and hydrated methylamine complexes in solid neon supported by ab initio calculations

For the first time investigation of water molecule complexed with methylamine (CH3NH2) in solid neon was performed from 80 to 6000 cm−1 using Fourier transform infrared spectroscopy. From concentration effects and help theoretical results we have identify several vibrational transitions for CH3NH2 dimer, CH3NH2-H2O, CH3NH2-(H2O)2 complexes. CH3NH2-H2O complex, where two submolecules interacting through hydrogen bonding, (IR) spectral changes (frequencies as well intensities) indicate that playing role proton donor, agreement previous works. Theoretical calculations at second-order Møller-Plesset level been obtain their equilibrium geometries spectra harmonic comparison experimental data allows us give structures observed