Bis[μ-3,5-bis-(2-pyridyl)pyrazolato]bis-(hydrogensulfato)dicopper(II) methanol disolvate

Abstract

The title compound, [Cu2(C13H9N 4)2(HSO4)2]·2CH 3OH, consists of discrete centrosymmetric dinuclear complex molecules and methanol solvent molecules. The CuII atom shows a square-pyramidal coordination geometry and is bonded to four N atoms of the two bis-chelating 3,5-bis-(2-pyrid-yl)pyrazol-ate ions (bpypz-) and one O atom of the hydrogensulfate ion. The bpypz- ligands in the complex molecule are virtually coplanar [dihedral angle between the mean ligand planes = 0.000(1)°] with the CuII atom deviating in opposite directions from their best plane by 0.2080 (12) Å. π-π stacking inter-actions between the pyridyl and pyrazole rings [centroid-centroid distance = 3.391 (3) Å] and strong O - H⋯O hydrogen bonds between the hydrogensulfate ligands and the methanol molecules assemble the molecules into a one-dimensional polymeric structure extending along the a axis. The methanol molecule acts both as an accepter and a donor in the hydrogen bonding. © Mishima et al. 2011.