(2-Aminopyrimidine-κN¹)diaqua(pyridine-2,6-dicarboxylato-κ³O²,N,O⁶)nickel(II) monohydrate

Abstract

The reaction of Ni(NO3)2·6H2O with pyridine-2,6-dicarboxylic acid, NaOH and 2-amino­pyrimidine in aqueous solution leads to the formation of the title complex, [Ni(C7H3NO4)(C4H5N3)(H2O)2]·H2O. The NiII ion is coordinated by one N and two O atoms of the tridentate chelating pyridine-2,6-dicarboxyl­ate anion, one heterocyclic N atom of the 2-amino­pyrimidine ligand, and two water mol­ecules. The resulting geometry for the [NiN2O4] coordination environment can be described as distorted octa­hedral. One uncoord­inated water mol­ecule completes the asymmetric unit. Extensive O—H⋯O and N—H⋯O hydrogen-bonding inter­actions between the NH2 group of 2-amino­pyrimidine, carboxyl­ate groups, and coordinated and uncoordinated water mol­ecules contribute to the formation of a three-dimensional supra­molecular structure.

Supramolecular assembled of hexameric water clusters into a 1D chain containing (H2O)6 and [(H2O)4O2] stabilized by hydrogen bonding in a copper complex

“…Hydrothermal synthesis has been successful for the preparation of some supramolecular compounds. In continuation of our earlier work on the synthesis of metal complexes with polycarboxylate ligands in the presence of 2-aminopyrimidine and under hydrothermal condition [25,26], the reaction of Cu(NO 3 ) 2 ·3H 2 O with Pyridine-2,6-dicarboxylic acid and 2-aminopyrimidine was investigated. Crystal structure of complex moiety of the copper complex, {[Cu(pydc)(amp)].3H 2 O} n , (pydc = pyridine-2,6-dicarboxylate ion, amp = 2-aminopyrimidine), was reported by Altin et al in 2004 [27].…”