The title complex [ZnL 2Cl 2]·C 2H 5OH (M=639.70;L=2 (O chlorophenyl)benzimidazole) was prepared and characterized by elemental analysis,IR and molar conductivity measurement.The analysis of its single crystal x ray diffraction was carried out to obtain the crystal data:monoclinic,space group P2 1/n,a=1.1612(3),b=1.9339(4),c=1.3369(3)nm,β=107.88(2)°,V=2.8572(11)nm 3,Z=4,D c=1.487kg·dm -3 ,μ=1.263mm -1 ,F(OOO)=1304,the final R=0.0462,wR=0.1016,(Δ/σ) max =0.001,S=0.884.It was showed that the Zinc(Ⅱ) cation is the central ion of a distorted tetrahedral coordination with two imidazole nitrogen atoms and two chlorine ions in the tetrahedral sites.Structural changes in ligands of complex were discussed.
The title compound C 13 H 9ClN 2(M=228.67) was prepared,and its single crystal was obtained.The crystal belongs to orthorhombic system,space group Pbca with cell parameters:a=0.70567(8),b=0.9978(2),c= 3.2464(4)nm ,V=2.2858(6)nm 3,Z=8,Dc=1.329kg/dm 3,F(000)=944,μ=0.305mm -1 .2377 independent reflections were collected,in which 1214[I>2σ(I)] reflections that could be observed were used for the structural analysis.The final refinement converged to R=0.0421,wR=0.0999,(Δ/σ) max =0.001,S=0.833.The dicyclic ring of benzimidazole and chlorobenzene ring formed a propeller configuration in the compound.
Under the microwave irradiattion,two benzoxazolyl-substituted pyridines were synthesized by condensation of oaminophenol and carboxylic acid.The optimum reaction conditions were:PPA as a catalyst,microwave power 500 W,and microwave irradiation time 4 min.The reaction was 60 times faster under microwave irradiation and the yield was higher than conventional heating.
