邻羟基苄基氨乙酸及其配合物的研究(VII)——三价钴配合物的合成、性质及结构

STUDIES ON N-o-HYDROXYBENZYLGLYCINE AND ITS METAL COMPLEXES (VII)——SYNTHESIS, PROPERTIES AND STRUCTURE OF Co(III)COMPLEX

在氨-氯化铵水溶液中,以氯化钴(Ⅱ),HBG(邻羟基苄基氮乙酸)为原料,经配位取代、氧化反应得到了Co(Ⅲ)的配合物,即氯化二[二邻羟基苄基氨乙酸合钴(Ⅲ)酸]·六氨合钴(Ⅲ)·七水盐,其分子式为[Co(NH_3)_6]·[Co(OC_6H_4CH_2NHCH_2COO)_2]_2,·Cl·7H_2O。进行了元素分析、摩尔电导、磁性、热谱测定,红外及紫外可见光谱的表征。培养得到了单晶,并用X射线分析测定它的晶体结构,其中配位阴离子CoL_2^-的配位环境是一个微变形的八面体。

The hexaamminecobalt (III) salt of Co (III) with N-o-hydroxybenzylglycine(HBG) was synthesized in NH_3-NH_4Cl aqueous solution by the oxidation of air. Itwas characterized by elemental analyses, molar conductance, magnetic moment.thermal analyses, infrared spectra and UV-spectra. The complex salt was provedto be [Co(NH_3)_6][Co(OC_6H_4CH_2NHCH_2COO)_2]_2. Cl. 7H_2O. The single crystal wasobtained in aqueous solution and the crystal structure was determinated by X-raydifraction analysis, showing that it is belong to monoclinic system and the spacegroup is A2/a(G2/c) with α=2.348 6(9)nm, b=2.660 5(6)nm, c=1.054 2(1)nm; α=β=90.00°, γ=128.42(4)°; Z=4. The coordination structure of the complex anion[Co(OO_6H_4CH_2NHCH_2COO)_2]^- is a slightly distorted octahedron.