Synthesis, crystal structure and spectroscopic studies of copper(II) complex of C-meso-1,5,8,12-tetramethyl-1,4,8,11-tetraazacyclotetradecane

被引：0
作者：
Kazuaki Tomono
Emi Otani
Riyako Ikeda
Yuji Soneta
Nanami Saita
Kazuo Miyamura
机构：
[1] Tokyo University of Science,Department of Chemistry, Faculty of Science
[2] Yamaguchi University,Material Chemistry, Graduate School of Science and Engineering
来源：
Journal of Inclusion Phenomena and Macrocyclic Chemistry | 2011年 / 70卷
关键词：
Copper(II); Tetraaza macrocycle; Crystal structure; Spectroscopic analysis; Coordination chemistry;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Copper(II) complex coordinated with cyclam-type macrocyclic tetramine, C-meso-1,5,8,12-tetramethyl-1,4,8,11-tetraazacyclotetradecane (2Cdmc) has been synthesized and characterized by single crystal X-ray crystallographic analysis and UV–Vis absorption spectra. Solved molecular structure of [Cu(2Cdmc)(H2O)]Cl2·2H2O (1) revealed that macrocyclic ligand 2Cdmc was in the most stable trans-III structure, but the C-methyl groups of 2Cdmc adopted energetically unfavorable axial configuration (C-axial). This complex 1 is the second example of complex of cyclam-type tetramine with only axially oriented C-methyl groups. This complex adopted five-coordinated square-pyramidal geometry with one water molecule occupying one of the two apical sites. Network of hydrogen bonds involving counter anions (Cl−), coordinating and non-coordinating water molecules, and N–H of 2Cdmc was present. UV–Vis spectra in various solutions also indicated the formation of five-, or six-coordinated complex in methanol and DMSO, but four-coordinated complex in water.
引用
收藏
页码：241 / 247
页数：6
相关论文
共 86 条
[1]  
Kong D-Y(2000)Synthesis, structural characterization and potentiometric studies of divalent metal complexes with an octadentate tetraazamacrocyclic ligand and their DNA cleavage Polyhedron 19 1527-1537
[2]  
Xie Y-Y(1999)Novel recognition of thymine base in double-stranded DNA by Zinc(II)-macrocyclic tetramine complexes appended with aromatic groups J. Am. Chem. Soc. 121 5426-5436
[3]  
Kikuta E(2004)Cyclam complexes and their applications in medicine Chem. Soc. Rev. 33 246-266
[4]  
Murata M(1999)Gadolinium(III) chelates as MRI contrast agents: structure, dynamics, and applications Chem. Rev. 99 2293-2352
[5]  
Katsube N(1986)Paramagnetic macrocyclic complexes as contrast agents for MR imaging: proton nuclear relaxation rate enhancement in aqueous solution and in rat tissues Radiology 159 525-530
[6]  
Koike T(1986)Electrochemical and structural studies of nickel(II) complexes of N-alkylated cyclam ligands: X-ray structures of Inorg. Chem. 25 552-558
[7]  
Kimura E(1994)-[Ni(C Inorg. Chem. 33 5855-5863
[8]  
Liang X(1993)H Inorg. Chem 32 2779-2784
[9]  
Sadler PJ(1965)N Inorg. Chem. 4 1102-1108
[10]  
Caravan P(1984))(OH J. Chem. Soc. Dalton. Trans. 9 1921-1925
123456789