Syntheses, crystal structures and solid state thermochromism of copper(II) complexes of trans-1,2-diaminocyclohexane

被引：25

作者：

Pariya, C ^{[1
]}

Liao, FL ^{[1
]}

Wang, SL ^{[1
]}

Chung, CS ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Chem, Hsinchu 30043, Taiwan

来源：

POLYHEDRON | 1998年 / 17卷 / 04期

关键词：

copper(II) complexes; trans-1,2-diaminocyclohexane; syntheses; single crystal structure; thermochromism; TG-DTA;

D O I：

10.1016/S0277-5387(97)00339-2

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The complexes CuL2X2.nH(2)O (L = trans-1,2-diaminocyclohexane; n = 2 when X is Cl and n = 0 when X is NO3) have been synthesized. The complexes [CuL2(H2O)(2)]Cl-2 (1) and [CuL2(NO3)(2)] (2) have been characterized by single crystal structural analyses and their thermochromism was studied in the solid state. Single crystal X-ray structure analysis of 1 and 2 shows that in both complexes copper ion possesses distorted (4+2) octahedral geometry with N4O2 chromophore. Complex 1 shows time-dependent reversible discontinuous thermochromism whereas, 2 shows reversible continuous thermochromism in the solid state. The discontinuous thermochromism in 1, is due to the different ligand field strength between H2O and Cl, and is associated with deaquation-anation reaction. The IR and electronic spectra of 2 vary with temperature, indicating reversible continuous thermochromism arising from axial interaction between semi-coordinated nitrate ions and CuN4 plane. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：547 / 554

页数：8

共 28 条

[1] SYNTHESIS, SPECTROSCOPIC AND STRUCTURAL-PROPERTIES OF 2,2-DIMETHYL-PROPANE-1,3-DIAMINECOPPER(II) COMPLEXES - TEMPERATURE-DEPENDENT TETRAGONAL DISTORTION IN SOME THERMOCHROMIC COMPLEXES - CRYSTAL AND MOLECULAR-STRUCTURE OF BIS(2,2-DIMETHYLPROPANE-1,3-DIAMINE)DIPERCHLORATOCOPPER(II) [J].