摘要
多聚配合物［Ｃｄ（β－ａｌａ）Ｃｌ２］用ＣｄＣｌ２与β－丙氨酸（β－ａｌａ，Ｈ３Ｎ＋ＣＨ２ＣＨ２ＣＯ２－）在水溶液反应制得，并用单晶结构分析法测定其结构．该配合物的化学式为Ｃ３Ｈ７ＣｄＣｌ２ＮＯ２，属正交晶系，空间群为Ｐｎｍａ（Ｎｏ．６２），ａ＝６９４．４（１），ｂ＝７９６．３（２），ｃ＝１２９３．１（３）ｐｍ，Ｖ＝０．７１５０（６）ｎｍ３，Ｚ＝４，Ｍｒ＝２７２．４０，Ｄｃ＝２．５３０Ｍｇ／ｍ３，用８３４独立衍射数据对结构进行精化，最后残差因子Ｒ１＝０．０４２１．结果表明，每个镉离子与４个Ｃｌ和２个β－ａｌａ的羧基氧原子配位，呈变形八面体结构．每对镉离子由２个Ｃｌ和１个双齿羧基桥连。
Polymeric [Cd(β alaCl 2] was prepared by reaction of CdCl 2 and β alanine(β ala,H 3N +CH 2CH 2CO 2 -)and the crystal structure has been determined by single-crystal structure analysis.The complex, formulated as C 3H 7CdCl 2NO 2,crystallizes in the orthorhombic space Pnma (No.62),with a =694 4(1), b =796 3(2), c =1 293 1(3) pm, V =0 715 0(6) nm 3, Z =4, M r=272 40, D c=2 530 Mg/m 3.The structure was refined with 834 unique reflections, giving the final R 1=0 042 1.The result shows that each Cd(Ⅱ) atom is coordinated by four chloro atoms and two oxygen atoms of the β ala carboxylate group, forming a distorted octahedral geometry; each pair of adjacent Cd(Ⅱ) atoms are triply bridged by two μ 2 chloro ligands and a syn syn carboxylate group of β ala,resulting in one dimensional polymeric chains running along the α- axis.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
1997年第3期114-116,共3页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
国家自然科学基金
中山大学科学基金
关键词
晶体结构
多聚配合物
聚羧基镉配合物
合成
cadmium(Ⅱ) chloride, amino acid, polymeric complex, crystal structure
