Intra-red absorption spectra of the single crystals of 1-methyl-thymine, 9-methyladenine and their 1:1 complex

摘要: Abstract Infra-red absorption spectra have been observed of thin sections the single crystals 1-methylthymine, 9-methyladenine, and their hydrogen-bonded 1:1 complex (AT dimer) by using polarized radiation in spectral region 4000-400 cm −1 . The bands due to in-plane out-of-plane vibrations are distinguished perpendicular molecular plane. directions transition moments were determined some parallel Assignments NH 2 deformation made on basis N-deuteration effects. A marked difference was between AT dimer an equimolar mechanical mixture 1-methylthymine 9-methyladenine. frequencies assignable groups found be sensitive manner hydrogen bonding.