Molecular Structure of a Binuclear Copper(II) Complex: [Cu2L2DMF2]·DMF·2ClO4 (LH = 4‐Methyl‐2,6‐Bis(indazol‐2‐Ylmethyl)phenol)

Abstract The molecular structure of a binuclear copper(II) complex [Cu 2 L 2 DMF 2 ]·DMF·2ClO 4 in which LH is 4‐methyl‐2,6‐bis (indazol‐2‐ylmethyl)phenol and DMF is N,N ‐dimethylformamide is reported. The structure of the crystal was characterized by X‐ray diffraction: monoclinic, space group P2 1 /C, Z = 2, a = 15.863(4), b = 20.642(3),c = 19.598(5) Å, β = 113.05(2)°. The final R and Rw values are 0.060 and 0.061, respectively, for 4777 reflections with I > 2σ(I). Each copper(II) is penta coordinate, with two N atoms from the indazole ring, two O atoms from phenolate in ligands and another O atom from DMF to form a distorted square‐pyramid. The mean value of the lengths of the four Cu‐N bonds is 1.987(6) Å and the Cu ⃛Cu distance is 3.094(1) Å No EPR signal was detected, and the magnetic moment has a small value μ = 1.17 per copper. These results indicate strong antiferromagnetic interaction between the two copper(II) ions.