A NEW TETRANUCLEAR DISTORTED OPEN-CUBANE COPPER(II) SCHIFF BASE COMPLEX: STRUCTURAL, SPECTRAL AND MAGNETIC CHARACTERIZATIONS
E. Gungor1, H. Kara1,2
1Balikesir University, Balikesir, Turkey
2Mugla Sitki Kocman University, Mugla, Turkey
Keywords: Schiff base, tetranuclear copper(II) complex, antiferromagnetic interaction
Abstract
A new tetranuclear complex [Cu4(L)4] (1) (H2L = N-(2-hydroxyethyl)-3-metoxysalicylaldimine) has been synthesized and characterized by crystal structure analysis and magnetic susceptibility. Single-crystal X-ray diffraction studies reveal that complex 1 contains three independent Cu4O4 open-cubane cores of 4+2 type (four short and two long Cu⋯Cu distances), where the copper(II) centers are linked by alkoxo-bridges. Each copper(II) ion have a distorted square-pyramidal geometry. Variable-temperature magnetic susceptibility measurements on the tetranuclear complex 1 in the range 2-300 K indicate dominant antiferromagnetic coupling ( J = -108.46) between copper(II) centers.
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