Synthesis, Crystal Structures and Magnetic Properties of a Linear Trinuclear Cu(II) Complex [Cu3(ClCH2COO)6(bpy)2] and a Dinuclear Complex [Cu2(bpy)2(μ-OH)(μ-OH2) (μ-ClCH2COO)](ClO4)2

被引：1

作者：

Thatipamula, Krishna Chary ^{[1
]}

Bhargavi, Govindugari ^{[1
]}

Rajasekharan, Melath, V ^{[1
]}

机构：

[1] Univ Hyderabad, Sch Chem, Hyderabad 500046, India

来源：

CHEMISTRYSELECT | 2019年 / 4卷 / 12期

关键词：

Copper(II); chloroacetate; carboxylate bridge; magnetic properties; hydroxo bridge; DFT calculations; X-RAY-STRUCTURE; EXCHANGE COUPLING-CONSTANTS; CU-II COMPLEXES; COPPER(II) COMPLEXES; METAL-COMPLEXES; CHLOROACETATE; MONO; DICHLOROACETATE; CARBOXYLATE; REACTIVITY;

D O I：

10.1002/slct.201803922

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two new triply bridged Cu(II) compounds [Cu-3(bpy)(2)(mu-ClCH2COO)(6)] (1) and [Cu-2(bpy)(2)(mu-OH)(mu-OH2)(mu-ClCH2COO)](ClO4)(2) (2) (where, bpy=2,2'-bipyridine) have been synthesized and their magnetic properties have been measured and correlated with structure. Compound 1 is a novel centrosymmetric tricopper compound with only carboxylate bridges. The terminal Cu2+ ions have [5 + 1] coordination while the central ion has [4 + 2] coordination. The three centres are antiferromagnetically coupled, the exchange parameters for the neighbouring and distant pairs of Cu(II) atoms being 2 J=-28.6 cm(-1) and 2 J'=-1.0 cm(-1), respectively. In compound 2 three types bridging modes are observed, viz., hydroxo, aquo and carboxylato. The two Cu(II) centers are ferromagnetically coupled (2 J=73.8 cm(-1)) as previously observed for several di-copper complexes with the same bridges. DFT calculations are in reasonable agreement with the magnetic exchange parameters for both dinuclear and trinuclear compounds.

引用

页码：3344 / 3350

页数：7

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