Syntheses, crystal structures, and magnetic properties of μ-O/μ-Cl bridged dinuclear manganese(II) and copper(II) complexes with schiff base ligand HL [HL = 2-(benzothiazol-2-yl-hydrazonomethyl)-6-methoxyphenol]

摘要

A novel versatile multidentate ligand 2-(benzothiazol-2-yl-hydrazonomethyl) -6-methoxyphenol (HL), was obtained from a condensation reaction between 2-hydrazino benzothiazole and o-vanillin. The reactions of HL with CuCl _2·2H_2O/Mn(ClO_4)_2· 6H_2O generated two novel dinuclear compounds Cu_2L(μ-Cl) Cl_2(CH_3OH)_2 (1) and Mn_2L _3(ClO_4)(CH_3CH_2OH)_3 (2). The crystal structures of 1 and 2 were determined by X-ray diffraction studies. The two copper atoms in complex 1 are connected by a L~- anion and a single chloro bridge with a Cu···Cu separation of 3.2729(4) ?. In complex 2, the two manganese atoms are held together by two L ~- anion bridges and the Mn···Mn separation amounts to 3.3433(7) ?. As expected, variable-temperature magnetic susceptibility measurements of complex 1 showed strong antiferromagnetic intramolecular coupling between the copper(II) atoms with J =-102.2 cm ~(-1), and evidenced for complex 2 weak antiferromagnetic coupling with J =-1.68 cm~(-1).