A tetracopper(II) complex with N,N '-bis(picolinoyl)hydrazine

作者：Maloth Swamy; Pal Samudranil^*

来源：Inorganica Chimica Acta, 2011, 372(1): 407-411.

DOI：10.1016/j.ica.2011.01.106

• Tetranuclear
• Copper(II)
• Diazine ligand
• Rectangular core
• Crystal structure

Synthesis, physical properties and X-ray structure of a hydrated tetranuclear copper(II) complex [Cu-4(mu-diph)(2)(mu-H2O)(2)(O2CCH3)(4)(H2O)(2)]center dot 4H(2)O with N,N'-bis(picolinoyl)hydrazine (H(2)diph) are reported. The centrosymmetric complex has two types of copper(II) centres with distorted square-pyramidal N2O3 coordination spheres. The dinucleating trans planar diph(2) ligands are parallel to each other and act as N2O-donor to one metal centre and N-2-donor to the other metal centre. The complex has a rectangular {Cu-4(mu-N-N)(2)(mu-OH2)(2)} core with Cu center dot center dot center dot Cu distances as 4.834(1) and 3.762(1) angstrom. Solid state as well as solution electronic spectra show several transitions in the wavelength range 700-280 nm. The room temperature (298 K) solid state magnetic moment is 3.55 mu(B). The powder EPR spectra at 298 and 130 K are very similar and axial (g(parallel to) = 2.25 and g(perpendicular to) = 2.08) in character.

• 出版日期2011-6-15