基于3-(羧甲基)-7-甲基-2-丙基-3H-苯并d咪唑-5-羧酸的新型锌(II)配位聚合物的合成及其晶体结构

摘要

以7-甲基-2-丙基-3H-苯并[d]咪唑-5-羧酸甲酯为原料,经还原反应和水解反应两步制得配体3-(羧甲基)-7-甲基-2-丙基-3H-苯并咪唑-5-羧酸(MZ);以Zn(NO3)2·6H2O为锌源,MZ经配位反应合成一个新型的锌(II)配合物{[Zn(MZ)2]·2H2O}n (3),其结构经1H NMR, FT-IR, X-射线单晶衍射和元素分析表征.3属单斜晶系,P2/c空间群,晶胞参数a=0.786 42(16) nm, b=1.072 1(2) nm, c=1.725 9(3) nm, a=g=90(λ), β=93.63(3)(λ), V=1.452 2(5) nm3, Dc=1.482 g·cm-3, Z=2, R1=0.059 3, wR2=0.141 5.%3-(Carboxymethyl)-7-methyl-2-propyl-3H-benzo[d]imidazole-5-carboxylic acid(MZ) was prepared from methyl 7-methyl-2-propyl-3H-benzo[d]imidazole-5-carboxylate by reduction reaction and hydrolytic reaction.A novel 3D supramolecular architecture {[Zn(MZ)2]·2H2O}n (3) was obtained through self-assembly of Zn(NO3)2·6H2O with MZ.The structure was characterized by1H NMR;FT-IR, X-ray single crystal diffraction analysis and elemental analysis.3 belongs to monoclinic system;space group P2/c with a=0.786 42(16) nm;b=1.072 1(2) nm;c=1.725 9(3) nm;a=g=90(λ),β=93.63(3)(λ),V=1.452 2(5) nm3;Dc=1.482 g·cm-3;Z=2;R1=0.059 3;wR2=0.141 5.