一个锰(Ⅲ)Schiff碱配合物[Mn(napn)(CH_3OH)_2]ClO_4的合成与晶体结构  

Synthesis and Crystal Structure of a New Manganese (Ⅲ) Schiff-base Complex [Mn(napn)(CH_3OH)_2]ClO_4

作　　者：周北川[1] 寇会忠[1] 高东昭[2] 廖代正[2] 王如骥[1] 李亚栋[1] 

机构地区：[1]清华大学化学系,北京,100084 [2]南开大学化学系,天津,300071

出　　处：《Chinese Journal of Structural Chemistry》2002年第5期549-552,共4页结构化学（英文）

摘　　要：合成了一个新配合物[Mn(napn)(CH3OH)2]ClO4 (C26H26 Cl N2O8Mn,Mr = 584.88,H2napn = 双a-萘酚醛缩乙二胺),并测定了其晶体结构。晶体属于三斜晶系,空间群P ,a = 7.813(1),b = 13.025(2),c = 14.089(2) ? = 64.89(3), = 83.98(3), = 78.11(3)海琕 = 1270.16 ?,Z = 2, Dc = 1.529 g/cm3, F(000) = 604, R = 0.0837, wR = 0.1636。锰(Ⅲ)离子的配位构型为拉长的八面体。Schiff碱配体napn2-中的N2O2在赤道平面与锰(Ⅲ)形成四配位,2个CH3OH中的O原子分别在赤道平面两侧轴向位置与锰(Ⅲ)配位。由于Jahn-Teller效应,轴向上的MnO平均键长为2.52 拧A硗猓О写嬖诜肿幽诤头肿蛹淝饧?A new manganese (Ⅲ) compound, [Mn(napn)(CH3OH)2]ClO4 (C26H26ClN2O8Mn, Mr = 584.88, napn2- = N,N-ethylenebis(1-naphtholideneaminato) dianion), was synthesized and characterized by IR spectroscopy and single-crystal X-ray diffraction analysis. The crystal data are as follows: triclinic system, space group P , a = 7.813(1), b = 13.025(2), c = 14.089(2) ? ?= 64.89(3), b = 83.98(3), g = 78.11(3), V = 1270.16 ?, Z = 2, Dc = 1.529 g/cm3, F(000) = 604, R = 0.0837 and wR = 0.1636 (all data). The structure consists of one [Mn(napn)(CH3OH)2]+ cation and one ClO4- anion. The Mn (Ⅲ) ion is six-coordinated, and the coordination sphere can be described as a distorted octahedron, due to the Jahn-Teller effect. The tetradentate Schiff-base ligand, napn2-, coordinates to the central metal atom with the N2O2 donor set of it on the equatorial plane (MnO: 1.691(4) and 2.069(5) ? MnN: 1.725(5) and 2.145(6) ?. Two O atoms of the two CH3OH molecules occupy the axial positions of the central metal atom with the MnO distances of 2.333(6) and 2.371(7) ? The O…HO hydrogen bonds are present both in the molecule and between two molecules.

关 键 词：锰(Ⅲ) SCHIFF碱 配合物 [Mn(napn)(CH3OH)2]ClO4 合成 JAHN-TELLER效应 氢键 晶体结构 锰超氧化物歧化酶 

分 类 号：O641.4[理学—物理化学]