Citation: YOU Xiu-Li, HU Tao, XU Lai, WENG Ying, XIA Hong-Ying. Syntheses, Crystal Structure and Magnetism of a Hexanuclear Copper(Ⅱ) Cluster with the Unique Two-parallel Three-site Strings Configuration[J]. Chinese Journal of Structural Chemistry, ;2015, 34(4): 569-575. doi: 10.14102/j.cnki.0254-5861.2011-0567 shu

Syntheses, Crystal Structure and Magnetism of a Hexanuclear Copper(Ⅱ) Cluster with the Unique Two-parallel Three-site Strings Configuration

1.
Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, China

Received Date: 12 November 2014
Available Online: 15 January 2015
Fund Project: Financially supported by the Education Department of Jiangxi Province (No. JXJG-14-10-6) (No. JXJG-14-10-6)

Treatment of a heptadentate ligand 2,2'-(((pyridine-2,6-diyl-bis(methylene))-bis((pyridin-2-ylmethyl)azanediyl))bis(methylene))diphenol (H₂L) possessing pyridinyl and phenolate groups, with three equivalents of Cu(ClO₄)₂·6H₂O in methanol under base conditions, gave rise to a hexanuclear cluster complex [Cu₆L₂(OH)₄](ClO₄)₄·4MeCN·0.5MeOH (1). Complex 1 crystallizes in triclinic, space group P1 with a=12.068(12), b=12.567(12), c=16.279(16)Å, α=105.694(12), β=93.631(13), γ=112.017(11)°, V=2166(4)Å³, Z=1, μ=1.651 mm^-1, D_c=1.599 Mg/m³, T=296(2) K, C_74.5H_79.5N₁₄O_24.5Cl₄Cu₆, M_r=2086.12, F(000)=1062.5, S=1.061, R=0.0521 and wR=0.1270. In the cation of complex 1, the six copper cores are arranged into a two-parallel three-site strings configuration with each metal exhibits a slightly distorted square-pyramidal geometry, resulting from the connection of donor pyridinyl nitrogen and phenolate oxygen atoms in ligand H₂L, and/or the oxygen donors in hydroxyl groups. In addition, magnetic susceptibility measurements revealed complex 1 displayed antiferromagnetic coupling.
- heptadentate ligand,
- multinuclear copper complex,
- crystal structure,
- magnetic
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