Millimeter Wave Spectrum of Glycine. A New Conformer

摘要: Abstract: More sensitive observations on the vapor of glycine, smallest amino acid, have been made in millimeter region. This work has led to identification a second conformer gas phase. hydrogens hydrogen bonded carbonyl oxygen and hydroxyl normal cis configuration with respect group. new is ~490 (150) cm-I lower energy than originally reported. Its spectrum weaker due smaller dipole moment (wa E 1.00 (15) D). The distortion fit 37 transitions yield A" = 10341.76 (17) MHz, B" 3876.195 (9) C" 2912.361 (10) MHz for ground state. excellent agreement between experiment theory discussed. Introduction moments, their rotational sDectra might indeed be In our previous paper wave glycine we reported particular con- former phase (labeled