Synthesis and structural characterization of [2-(2-1H-imidazoly)-1H- imidazolium nitrate] and [2-(2-1H-Imidazoly)-2H-imidazolium phthalyl glycinate] based on the 2,2′-bi-1H-imidazole molecule

摘要

Two new compounds (H_3biim)(NO_3)(1) and (H _4biim)(phthgly)_2 (2) (H_2biim=biimidazole; Hphthgly=N-phthaloylglycine) have been synthesized and characterized by luminescence and single crystal X-ray diffraction study. Compound 1 crystallizes in the monoclinic space group C2/c, where a = 14.8078(15), b = 5.9233(6), c = 20.028(2) ?, β = 92.7910(10)°, V = 1754.6(3) ?~3 and Z = 8. Compound 2 crystallizes in the monoclinic space group P2(1), where a = 15.3775(14), b = 5.3200(6), c = 6.4689(18)?, β = 115.418(2)° V = 1216.9(2)?~3 and Z = 4. In 1, the N-H groups of H _3biim~+ and the oxygen atoms of NO_3~- are linked by hydrogen bonds leading to H_3biim~+(N,N)-R _2~2 (10) and N-H???O interactions forming infinite 1D helical chains along the b-axis. Compound 2 consists of a planar diprotonated biimidazole moiety and two phthgly anions which connect to the dication by hydrogen bonds phthgly-(O,O)-R _2~2 (9).