Sulfate-bridged dimeric trinuclear copper(II)–pyrazolate complex with three different terminal ligands

Acta Crystallographica Section E: Crystallographic Communications

Gellert Mezei¹ 

[1] Department of Chemistry, Western Michigan University, Kalamazoo, Michigan, USA;

关键词: crystal structure;    copper;    pyrazolate;    trinuclear complex;    terminal sulfate ligand;   

DOI  :  10.1107/S2056989016010719

来源: DOAJ

【 摘 要 】

The reaction of CuSO4·5H2O, 4-chloropyrazole (4-Cl-pzH) and triethylamine (Et3N) in dimethylformamide (DMF) produced crystals of diaquahexakis(μ-4-chloropyrazolato-κ2N:N′)bis(N,N-dimethylformamide)di-μ3-hydroxido-bis(μ4-sulfato-κ4O:O′:O′′:O′′)hexacopper(II) N,N-dimethylformamide tetrasolvate dihydrate, [Cu3(OH)(SO4)(C3H2ClN2)3(C3H7NO)(H2O)]2·4C3H7NO·2H2O. The centrosymmetric dimeric molecule consists of two trinuclear copper–pyrazolate units bridged by two sulfate ions. The title compound provides the first example of a trinuclear copper–pyrazolate complex with three different terminal ligands on the Cu atoms, and also the first example of such complex with a strongly binding basal sulfate ion. Within each trinuclear unit, the CuII atoms are bridged by μ-pyrazolate groups and a central μ3-OH group, and are coordinated by terminal sulfate, H2O and DMF ligands, respectively. Moreover, the sulfate O atoms coordinate at the apical position to the Cu atoms of the symmetry-related unit, providing square–pyramidal coordination geometry around each copper cation. The metal complex and solvent molecules are involved in O—H...O hydrogen bonds, leading to a two-dimensional network parallel to (10-1).

【 授权许可】

Unknown