Hydrothermal Synthesis and Crystal Structure of [Mn(phen)-(m-phth)]_n (phen =1,10-phenanthroline, m-phth = isophthalate)

摘要

Hydrothermal reaction of 1,2,4-benzenetricarboxylic acid, and MnCl_2·4H_2O with 1,10-phenanthroline gave the title complex, [Mn(phen)(m-phth)]_n, which crystallizes in the monoclinic system, space group P2/c with a = 0.83582(3) nm, b =1.04246(4) nm, c= 1.87777(7) nm, β= 100.314(2)°, V= 1.60968(10) nm~3, Z=4, and the final R =0.0576, wR=0.l294. In the complex, each Mn(II) ion is coordinated to four O atoms of carboxylate groups and two N atoms of phen. Isophthalate was generated in situ through the loss of one carboxylate group of 1,2,4-benzenetricarboxylic acid under the hydrothermal condition. Each isophthalate is bound to three manganese atoms through O atoms of carboxylate in bridging and chelating fashion, affording manganese(II) pairs that are linked by the isophthalate group to yield a zig-zag chain along the c-axis.