Binuclear copper(II) complexes of tetradentate (Ne) diazine ligands. Crystal structures of [μ-1,4-Bis(4,6-dimethyl-2-pyridylamino)phthalazine- N,μ- N3,μ N3, N]-(μ-Dichloro)dichlorodicopper(II), [μ-3,6-Bis(2-pyridylthio)pyridazine- N,μ-N 1,μ- N2, N] (μ-dichloro)dichlorodicopper(II) ethanol, and 3,6-Bis(2-pyridylthio)-pyridazine

Abstract

The X-ray structures of two binuclear copper(II) chloride complexes of the tetradentate ligands 1,4- bis(4,6-dimethyl-2-pyridylamino)phthalazine (PAP46Me) and 3,6-bis(2-pyridylthio)pyridazine are reported. [Cu 2(PAP46Me)Cl 4] ( 1) and [Cu 2(PTP)Cl 4]· CH 3CH 2OH ( 2) contain triply bridged binuclear centres involving a diazine ( N N) and two chlorobridges with copper-copper separations in the fange 3.19–3.25 Å and distorted square pyramidal copper stereochemistry. The reduced room temperature magnetic moments indicate antiferromagnetically coupled binuclear copper( II) centres. Complex 1 forms green crystals with a= 15.795(3), b=10.661(3), c=16.155(4) Å, β= 113.82(3)°, C2/ c, Z = 4, R f=0.031. Complex ( 2) forms green crystals with a=33.9022(8), b= 9.1626(5), c= 15.7885(5) Å,β= 114.853(2)°, C2/ c, Z=8, R f=0.047. The structure of the ligand PTP is also reported and compared with that of 2.