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Synthesis, Structure, and Magnetic Properties of Three Chiral Sodium‐Centered Polynuclear Copper(II) Clusters with L ‐Alanine
Author(s) -
Hu ShengMin,
Xiang ShengChang,
Zhang JianJun,
Sheng TianLu,
Fu RuiBiao,
Wu XinTao
Publication year - 2008
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200701128
Subject(s) - chemistry , carboxylate , octahedron , copper , crystallography , dimer , antiferromagnetism , sodium , crystal structure , alanine , magnetic susceptibility , ion , inorganic chemistry , stereochemistry , amino acid , organic chemistry , biochemistry , physics , condensed matter physics
By controlling the reactant proportion, three sodium‐centered polynuclear octahedral copper(II)–amino acid clusters, [Na⊂{Cu 6 (Ala) 8 (H 2 O)(ClO 4 )}] · 4ClO 4 · 4H 2 O ( 1 ), Na[Na⊂{Cu 6 (Ala) 8 (ClO 4 )}] 2 · 9ClO 4 · 8H 2 O ( 2 ), and [Na⊂{Cu 5 (Ala) 6 (H 2 O) 3 }] n · 5 n (ClO 4 ) · 3 n (H 2 O) ( 3 ) (Ala = L ‐alanine), were synthesized. The structures were characterized by X‐ray structure analysis. The structure of 1 can be described as an octahedron formed with six copper atoms in which four Cu(Ala) 2 ligands bridge two axial copper ions and capture one Na + in the center of the cage and that of 2 as an octahedral dimer that is linked by two carboxylate oxygen atoms. Complex 3 is a chain composed of incomplete octahedron [NaCu 5 ] units linked together by two carboxylate oxygen atoms. The magnetic susceptibility measurements indicate that all three clusters are ferromagnetic overall, although the intercluster interactions may be antiferromagnetic. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)