Combined Effects of Diamines and Carboxylate Bridges on Structural and Magnetic Properties of a Series of Polynuclear Copper(II) Complexes with 1,1-Cyclobutanedicarboxylic Acid
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- 作者：Raú ; l Baldomá ; Montserrat Monfort ; Joan Ribas ; Xavier Solans ; Miguel A. Maestro
- 刊名：Inorganic Chemistry
- 出版年：2006
- 出版时间：October 2, 2006
- 年：2006
- 卷：45
- 期：20
- 页码：8144 - 8155
- 全文大小：497K
- 年卷期：v.45,no.20(October 2, 2006)
- ISSN：1520-510X
文摘
Six new copper(II) complexes of formula [Cu(
-cbdca)(H2O)]n (1) (cbdca = cyclobutanedicarboxylate), [Cu2(-cbdca)2(-bipy)2]n (2) (bipy = 4,4'-bipyridine), [Cu(-cbdca)(-bpe)]n (3) (bpe = 1,2-bis(4-pyridyl)ethane), [Cu(-cbdca)(bpy)]2 (4) (bpy = 2,2'-bipyridine), [Cu(terpy)(ClO4)]2(-cbdca)·H2O (5) (terpy = 2,2':6',2' '-terpyridine), and[Cu(cbdca)(phen) (H2O)]·2H2O (6) (phen = 1,10-phenanthroline) were obtained and structurally characterized byX-ray crystallography. Complex 1 is a two-dimensional network with a carboxylate bridging ligand in syn-anti(equatorial-equatorial) coordination mode. Complexes 2 and 3 are formed by chains through syn-anti (equatorial-apical) carboxylate bridges, linked to one another by the corresponding amine giving two-dimensional nets. Complexes4 and 5 are dinuclear, with the copper ions linked by two oxo (from two different carboxylate) bridging ligands in4 and with only one carboxylate showing the unusual bis-unidentate mode in complex 5. Complex 6 is mononuclear,with the carboxylate linked to copper(II) in a chelated form. Intermolecular hydrogen bonds and 
- stackinginteractions build an extended two-dimensional network. Magnetic susceptibility measurements of complexes 1-5in the temperature range 2-300 K show the occurrence of weak ferromagnetic coupling for 1 and 4 (J = 4.76 and4.44 cm-1, respectively) and very weak antiferromagnetic coupling for 2, 3, and 5 (J = -0.94, -0.67, and -1.61cm-1, respectively). Structural features and magnetic values are compared with those reported for the similarcopper(II) malonate and phenylmalonate complexes.
-cbdca)(H2O)]n (1) (cbdca = cyclobutanedicarboxylate), [Cu2(-cbdca)2(-bipy)2]n (2) (bipy = 4,4'-bipyridine), [Cu(-cbdca)(-bpe)]n (3) (bpe = 1,2-bis(4-pyridyl)ethane), [Cu(-cbdca)(bpy)]2 (4) (bpy = 2,2'-bipyridine), [Cu(terpy)(ClO4)]2(-cbdca)·H2O (5) (terpy = 2,2':6',2' '-terpyridine), and[Cu(cbdca)(phen) (H2O)]·2H2O (6) (phen = 1,10-phenanthroline) were obtained and structurally characterized byX-ray crystallography. Complex 1 is a two-dimensional network with a carboxylate bridging ligand in syn-anti(equatorial-equatorial) coordination mode. Complexes 2 and 3 are formed by chains through syn-anti (equatorial-apical) carboxylate bridges, linked to one another by the corresponding amine giving two-dimensional nets. Complexes4 and 5 are dinuclear, with the copper ions linked by two oxo (from two different carboxylate) bridging ligands in4 and with only one carboxylate showing the unusual bis-unidentate mode in complex 5. Complex 6 is mononuclear,with the carboxylate linked to copper(II) in a chelated form. Intermolecular hydrogen bonds and - stackinginteractions build an extended two-dimensional network. Magnetic susceptibility measurements of complexes 1-5in the temperature range 2-300 K show the occurrence of weak ferromagnetic coupling for 1 and 4 (J = 4.76 and4.44 cm-1, respectively) and very weak antiferromagnetic coupling for 2, 3, and 5 (J = -0.94, -0.67, and -1.61cm-1, respectively). Structural features and magnetic values are compared with those reported for the similarcopper(II) malonate and phenylmalonate complexes.© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |