Synthesis, characterization and thermodynamic study of copper(II) complexes with unsymmetric tetradentate Schiff base ligands and X-ray structure of {methyl-2-[N-[2-(5-chloro-2-phenolate)methylidynenitrilo]ethyl}aminato(-1)-1-cyclopentenedithiocarboxylatecopper(II)

被引：17
作者：
Asadi, Mozaffar [1 ]
Mohammadi, Khosro [2 ]
Esmaielzadeh, Sheida [1 ]
Etemadi, Bijan [3 ]
Fun, Hoong-Kun [4 ]
机构：
[1] Shiraz Univ, Dept Chem, Coll Sci, Shiraz 71454, Iran
[2] Persian Gulf Univ, Dept Chem, Fac Sci, Bushehr 75169, Iran
[3] Shiraz Univ, Dept Earth Sci, Coll Sci, Shiraz 71454, Iran
[4] Univ Sains Malaysia, Sch Phys, Xray Crystallog Unit, George Town 11800, Malaysia
来源：
INORGANICA CHIMICA ACTA | 2009年 / 362卷 / 14期
关键词：
Unsymmetrical Schiff base complex; Formation constant; X-ray crystal structures; Thermodynamic; Copper complex; NITROGEN CHELATING-AGENTS; METAL-COMPLEXES; COBALT(III) COMPLEXES; NICKEL(II) COMPLEXES; CRYSTAL-STRUCTURES; CU(II) COMPLEXES; REDOX; SALEN; PROTEINS; SITES;
D O I：
10.1016/j.ica.2009.07.025
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A set of two Cu(II) complexes, [Cu(cdXsalen)] and [Cu(cdXsalMeen)] derived from Schiff base ligands (H(2)cdXsalen: methyl-2-{[2-(2-X-phenyl)methylidynenitrilo]ethyl}amino-1-cyclopentenedithiocarboxylate and H(2)cdXsalMeen: methyl-2-{[1-methyl-2-(2-X-phenyl)methylidynenitrilo]ethyl}amino-1-cyclopenteneithiocarboxylate where X = hydroxyl, methoxy, nitro, sodiumsulfite, chloro, bromo and H(2)cdMesalen: methyl-2-{[2-(2-hydroxyphenyl)ethylidynenitrilo]ethyl}amino-1-cyclopentenedithiocarboxylate; H(2)cdPhsalen: methyl-2-{[2-(2-hydroxyphenyl)phenylidynenitrilo]ethyl}amino-1-cyclopentenedithiocarboxylate; H(2)cdMesalMeen: methyl-2-{[1-methyl-2-(2- hydroxyphenyl)ethylidynenitrilo]ethyl}amino-1-cyclopentenedithiocarboxylate; H(2)cdPhsalMeen: methyl-2-{[1-methyl-2-(2-hydroxyphenyl)phenylidynenitrilo]ethyl}amino-1-cyclopentenedi-thiocarboxylate) with an unsymmetric NNOS coordination sphere have been synthesized and characterized by elemental analysis, IR, UV-Vis and mass spectrometry. The thermodynamic formation constants of the complexes were measured spectrophotometrically, at constant ionic strength 0.1 M (NaClO4), at 25 degrees C in DMF solvent. The trend of the complex formation for copper is as follow: [Cu(cdMesalen)] > [Cu(cdsalen)] > [Cu(cdPhsalen)] [Cu(cdMesalMeen)] > [Cu(cdsalMeen)] > [Cu(cdPhsalMeen)] and [Cu(cd5OMesalen)] > [Cu(cd3OMesalen)] > [Cu(cd4OMesalen)] [Cu(cd5OMesalMeen)] > [Cu(cd3OMesalMeen)] > [Cu(cd4OMesalMeen)] and [Cu(cd5OMesalen)] > [Cu(cdsalen)] > [Cu(cd5Brsalen)] > [Cu(cd5Clsalen)] > [Cu(cd5NO(2)salen)] > [Cu(cd5SO(3) Nasalen)] [Cu(cd5OMesalMeen)] > [Cu(cdsalMeen)] > [Cu(cd5BrsalMeen)] > [Cu(cd5ClsalMeen)] > [Cu(cd5NO(2)salMeen)] > [Cu(cd5SO(3)NasalMeen)] and [Cu(cdXsalMeen > [Cu(cdXsalen)]. The structure of {methyl-2-[N-[2-(5-chloro-2-phenolate)methylidynenitrilo]ethyl}aminato(-1)-1-cyclopentene-dithiocarboxylatecopper(II), [Cu(cd5Clsalen)], has been determined by X- ray crystallography. The complex shows normal planar geometry around the copper center. (c) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：4913 / 4920
页数：8
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