Metal complexes of multidentate ligands containing carbonyl and α-di-imine groups. Crystal and molecular structure of aquabis[2-(2-pyridyl)quinazolin-4(3H)-onato]copper(II)

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Abstract
The title compound (IV) has been prepared and its structure determined from X-ray diffraction data. The structure was solved by Patterson and Fourier methods and refined using least-squares techniques to R 4.1% for 3 258 independent reflections. Crystals are triclinic, space group P with unit cell dimensions a= 12.20(1). b= 13.91(1), c= 7.35(1)Å: α= 91.7(1), β= 112.7(1), γ= 103.9(1)°Z= 2. Co-ordination round copper is approximately square pyramidal: a water molecule [Cu–O 2.014(4)Å], a chelate ligand [Cu–N(py) 2.022(4), Cu–N 1.992(4)Å], and one nitrogen atom [Cu–N 1.987(4)Å] of the second chelate ligand form the base, and the pyridine nitrogen [Cu–N(py) 2.245(4)Å] of the second ligand forms the apex.

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