グアニンの2価銅錯体のプロトネーション部位と分子間水素結合赤外線吸収スペクトルによる研究

概要

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The infrared (IR) spectra of guanine, guanine・HCl, and Cu (guanine) Cl_3・H_2O were examined in the 4000-400 cm^<-1> region. In the IR spectrum of guanine・HCl, the bands at 2725,2520,and 2485 cm^<-1> are assigned to NH stretching of weak NH^+....Cl^- intermolecular hydrogen bonds of the ring protonated N atom and chlorine atom. In the IR spectrum of Cu (guanine) Cl_3・H_2O, a band is observed at 2755 cm^<-1> and this band is reasonably assigned to the presence of weak NH^+....Cl^- intermolecular hydrogen bonds similar to the assignments of the IR spectrum of guanine・HCl. In the IR spectrum of Cu (guanine)-Cl_3・H_2O, the strong band at 2690 cm^<-1> is attributed to N (9)-H stretching vibration, for no bands are observed in this region in the IR spectra of guanine・HCl and Cu (guanine)-Cl_3・H_2O whose nitrogen atoms at N9 are not protonated. The bands at 548 cm^<-1> in the spectrum of guanine, and at 550 cm^<-1> in the spectrum of Cu (guanine) Cl_3・H_2O are proposed to be assigned to C=O and ring deformation vibrations.
公益社団法人日本薬学会の論文
1977-10-25