Search

Hydro­thermal reaction of Zn(NO3)2·6H2O with pyridine-2,5-dicarboxylic acid, 4,4′-bipyridine and pyridine in a 1:1:1:2 molar ratio affords the title complex, (C10H10N2)[Zn(C7H3NO4)2(H2O)2], in which both ions are centrosymmetric. The ZnII atom is octahedrally coordin­ated by two pyridine-2,5-dicarboxyl­ate chelating ligands and two water mol­ecules in a distorted octa­hedral geometry. 4,4′-Bipyridinium, acting as counter-ion, has hydrogen-bonding inter­actions with pyridine-2,5-dicarboxyl­ate, forming a three-dimensional structure. [ABSTRACT FROM AUTHOR]

In the trinuclear nickel(II) complex of the title compound, [Ni3(C30H20N4O6)2(C5H5N)2(C2H6NO)2]·2C3H7NO·0.5H2O, the central Ni2+ ion is located on an inversion centre. This Ni2+ ion has a distorted octahedral coordination geometry involv­ing two N and two O atoms from the 2′-salicyl­benzo­hydrazidate ligands in the equatorial plane and two N atoms from two di­methyl­form­amide molecules in the axial positions. The inversion-related outer Ni2+ ions, separated by 9.3038 (7) Å, have square-planar coordination environments. [ABSTRACT FROM AUTHOR]

The VV ion in the title complex, [V(C15H12N2O4)(C3H7O)O], is in a distorted square-pyramidal environment. Two O atoms and one N atom from the tridentate hydrazidate ligand, and an O atom from the depronated solvent mol­ecule, define the basal plane, and the oxo O atom occupies the apical position. [ABSTRACT FROM AUTHOR]