高氯酸镧甘氨酸水体系及其新相中配合物La(Gly)_3(ClO_4)_3·2H_2O结构的研究  

Studies on the System La(ClO_4)_(3-(Glycme(Gly)-H_2O(at 25℃)and Crystal Structure of Complex La(Gly)_3(ClO_4)_3·2H_2O in the System

作　　者：陈菊香[1] 冉新权[1] 郭志箴[1] 陈运生[1] 

机构地区：[1]西北大学化学系,西安710069

出　　处：《高等学校化学学报》1992年第9期1157-1160,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金

摘　　要：测定了La(ClO_4)_3-Gly-H_2O在25℃时体系的溶度,并绘制了相应的溶度图.体系中形成了2个新配合物La(Gly)_3(ClO_4)_(3)·2H_2O(Ⅰ)和La(Gly)_4(ClO_4)_3(Ⅱ).(Ⅰ)为固液异成分溶解、(Ⅱ)为固液同成分溶解的化合物,同时以相图为依据合成并培养了配合物(Ⅰ)的单晶,测定了晶体结构,其化学式为(La_2(Gly)_6(H_2O)_4]·6ClO_4,晶体属三斜晶系,P1空间群,每个晶胞中有2个化学式量.晶胞参数:a=1.0693(3)nm,b=1.2956(3)nm,c=0.8762(3)nm,α=82.83(3)°,β=67.25(3)°,γ=71.50(2)°,配位单元中镧为9配位,其配位多面体为畸变的三冠三角棱柱体.The title system was studied,its equilibrium diagram was constructed by solubilities.There were two complexes La(Gly)3(ClO4)3·2H2O(I) and La(Gly)4(ClO4)3(II) occurring in the system.The incongruent complexes (I) was synthsized,its crystal structure was determined by X-ray diffraction,the structure of (I) consists of [La2(Gly)5(H2O)4]6+ cation and perchlotate ions.The crystal is triclinic with space group of P1 The unit cell parameters are as follows:a=1.0693(3) nm,b=1.25956(3) nm,c=0.8762 nm,a=82.83(3)°,β=67.25 (3)° γ=71.50(2)°,forming a distorted tricapped trigonal prism.

关 键 词：氨基酸 高氯酸镧 晶体结构 

分 类 号：O614.331[理学—无机化学]