双核七配位K4[InⅢ(cydta)(H2O)]4·14H2O配合物的合成与结构

采用X-射线衍射仪测定了配合物K4In(cydta)(H2O)]4.14H2O(cydta=反式-1,2-环己二氨四乙酸)的结构,该晶体属于单斜晶系Fdd2空间群,晶体学数据为:a=1.4460(3)nm,b=3.5530(7)nm,c=1.6290(3)nm,β=90.21(3)°,V=8.369(3)nm3,Z=4,M=2228.93,Dc=1.769 gcm-3,μ=1.391 mm-1and F(000)=4464,R和wR值分别为0.0631和0.2786。共收集15331个独立衍射数据,其中14708I>2.0σ()]为独立衍射点。配合物的分子由四个结构单元组成,每一结构单元In(cydta)(H2O)]-铟离子七配位单帽变形三棱锥结构,其中心离子In与配体cydta中的两个N原子和四个O原子及一个水分子直接配位形成七配位结构.

Synthesis and structure of two-dimension tetranuclear seven-coordinate K4[nⅢ (cydta) (H2O)]4·14H2O complex

The crystal and molecular structures of the K4InⅢ (cydta)(H2O)]4·14H2O (cydta = trans-1,2-cydohexanediaminetetraacetic acid) complex has been determined by single-crystal X-ray structure analysis.c space group. The crystal data are as follows:a= 1. 4460(3) nm,b=3. 5530(7) nm,c=1. 6290(3) nm,β=The final R and wR values are 0.0631 and 0.2786 for 14708 I＞2.0σ(Ⅰ)] reflections,and 0. 1631 and 0.2786 for all 15331 unique reflections ,respectively. The total complex molecule is composed of four close parts in structure. The every part around the InⅢ ion in the InⅢ (cydta) (H2O)]- complex anion has a sevencoordinate structure with distorted monocapped trigonal-prism,in which the cydta as a hexadentate ligand coordinates to the central InⅢ ion with two N atoms and four O atoms,in addition,a water molecule directly coordinate to the central InⅢ ion as the seventh ligand also.