Vibrational assignments of N,N-bis(3,5-dimethyl-2-hydroxybenzyl)methylamine in the fingerprint region

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摘要：

The compound N,N-bis(3,5-dimethyl-2-hydroxybenzyl)methylamine is synthesized to model the phenolic resulting from ring opening polymerization of benzoxazine monomers. Fundamental vibrational assignments of N,N-bis(3,5-dimethyl-2-hydroxybenzyl)methylamine are made by the analysis of the fingerprint region (2000-500 cm 1 ) of the infrared and Raman spectra of crystalline, quenched, and molten dimers. In addition, the hydrogens in the methylene bridge structure are deuterated to provide insight into vibrations due to the presence of the bridge structure. The structure of hydrogenated and deuterated model dimers is verified by 1 H and 13 C nuclear magnetic resonance spectroscopy.

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关键词：

Experimental/ infrared spectra isotope shifts nuclear magnetic resonance organic compounds proton magnetic resonance Raman spectra vibrational states/ N,N-bis(3,5-dimethyl-2-hydroxybenzyl)methylamine fingerprint region Raman spectra phenolic ring opening polymerization benzoxazine monomers fundamental vibrational assignments crystalline dimers quenched dimers molten dimers methylene bridge structure deuteration hydrogenated model dimers 1H nuclear magnetic resonance spectroscopy 13C nuclear magnetic resonance spectroscopy PMR spectroscopy NMR spectroscopy IR spectra 2000 to 50 cm -1/ A3310G Vibrational analysis (molecular spectra) A3520P Molecular rotation, vibration, and vibration-rotation constants A3320F Raman and Rayleigh molecular spectra A3320E Infrared molecular spectra A3370J Molecular line and band widths, shapes, and shifts A3325 Nuclear magnetic resonance and relaxation in molecules nuclear quadrupole resonance (NQR)/ wavelength 5.0E-06 to 2.0E-04 m