A new ionic compound ｛[2-(3′-pyridyl)benzimidazoleH2]2+·[SbCl4]-·Cl-｝4 was synthesized by the hy- drothermal reaction of o-diaminobenzene, nicotinic acid with SbCl3 in 1∶1 HCl solution. The structure was charac- terized by chemical analysis, elemental analysis and IR patterns. The single crystal structure was determined by X-ray single crystal diffraction. It crystallizes in monoclinic system, space group P21/n with a=2.107 9(4) nm, b= 1.482 0(3) nm, c=2.113 4(4) nm, β=93.44(3)°, Z=4, V=6.590(2) nm3, Dc=2.001 g·cm-3, μ=2.480 mm-1, F(000)= 3840, R1=0.0468, wR2=0.1163. The single crystal structure indicates that the four chlorines coordinated to the antimony atom forms a distorted triangle bipyramid configuration together with the lone electron pair on the Sb atom. The [SbCl4]- to 2-(3′-pyridyl)benzimidazole cation and Cl- by weak interaction forms the ionic crystal. It has been proved that the title compound has antibacterial activity. CCDC: 283824.
The equilibrium solubility of NaCl-ZnCl2-HCl（～9%）-H2O quaternary system at 25℃was determined and the phase diagram was constructed.This system is complicated with one compound 5NaCl·ZnCl2·0.5H2O which has been obtained from the system and has been characterized by XRD.The result shows that compound 5NaCl·ZnCl2·0.5H2O is the new one which has not been reported before.For compound 5NaCl·ZnCl2·0.5H2O parameter of unit cell is a =14.900nm;c=25.160 and it belongs to quadratic system.
