Synthesis and crystal structure of a new copper(II) complex based on 5-ethyl-3-(pyridin-2-yl)-1,2,4-triazole

The title compound, bis­[μ-3-ethyl-5-(pyridin-2-yl)-1H-1,2,4-triazol-1-ido]bis[acetato­(di­methyl­formamide)­copper(II)], [Cu₂(C₉H₉N₄)₂(C₂H₃O₂)₂(C₃H₇NO)₂] or [Cu₂(L^Et)₂(OAc)₂(dmf)₂], is a triazolate complex, which contains two 3-(2-pyrid­yl)-5-ethyl-triazolates (L^Et)⁻ in bidentate-bridged coordination modes. Both copper atoms are involved in the formation of a planar six-membered metallocycle Cu–[N—N]₂–Cu. The inversion center of the complex is located at the mid-point of the Cu⋯Cu vector. Each Cu^II atom has a distorted trigonal–bipyramidal environment formed by the three nitro­gen atoms of the deprotonated bridging 3-(2-pyrid­yl)-5-ethyl-triazolate unit, oxygen atoms of the OAc⁻ group and dmf mol­ecule. In the crystal, C—H⋯O hydrogen bonds link the mol­ecules into chains running along the c-axis direction.