Catena-bis(aqua(3-oxy-2-pyridono)copper(II))μ-pyrazine diperchlorate: a perchlorate-bridged magnetic ladder

被引：14
作者：
Awwadi, Firas F. [1 ,2 ]
Dawe, Louise N. [3 ]
Landee, Christopher P. [4 ]
Turnbull, Mark M. [1 ]
机构：
[1] Clark Univ, Carlson Sch Chem & Biochem, Worcester, MA 01610 USA
[2] Univ Jordan, Dept Chem, Amman 11942, Jordan
[3] Mem Univ Newfoundland, Dept Chem, St John, NF A1C 5S7, Canada
[4] Clark Univ, Dept Phys, Worcester, MA 01610 USA
来源：
JOURNAL OF COORDINATION CHEMISTRY | 2012年 / 65卷 / 17期
基金：
美国国家科学基金会;
关键词：
Copper(II); Pyrazine; Bridging perchlorate; Magnetic susceptibility; Crystal structure; COPPER(II) COMPLEXES; CRYSTAL-STRUCTURE; COORDINATION POLYMERS; LIGAND; MONONUCLEAR; AFFINITY; EXCHANGE; BEHAVIOR; CLUSTER; CHAIN;
D O I：
10.1080/00958972.2012.710844
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Reaction of Cu(ClO4)(2)center dot 6H(2)O with pyrazine (pz) and 2,3-dihydroxy pyridine in aqueous solution generates bis(aqua(3-oxy-2-pyridono)copper(II))mu-pyrazine diperchlorate. The compound crystallizes in the triclinic space group P (1) over bar. The aqua(3-oxy-2-pyridono)copper(II) units are bridged by pyrazine to form a dimer. These dimers are further bridged by perchlorate to form a structural ladder parallel to the b-axis. Hydrogen bonding interactions and pi-stacking of the pyridone rings also provide structural stability to the lattice and provide potential magnetic superexchange pathways. Temperature-dependent magnetic susceptibility data reveal a maximum in chi near 6 K and exhibit a rapid drop in chi at lower temperatures, in agreement with a singlet ground state. The use of several models for fitting the magnetic data gave values of approximately -10 K for the dimer interaction and approximately +1.5 K for the interdimer interaction.
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收藏
页码：3064 / 3074
页数：11
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