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.
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.
