Synthesis and Crystal Structure of Tetraquaorotatonickel(II) Monohydrate

Abstract

The title compound, tetraquaorotatonickel(II) monohydrate, C₅H₁₂N₂O₉Ni, crystallizes in the monoclinic space group P1 with the following unit-cell parameters: a = 7.2282(4)Å, b = 8.2959(4)Å, c = 10.0611(5)Å, α = 80.115(4)°, β = 70.479(4)°, γ = 65.779(4)° and Z = 2. The Ni^II ion is coordinated by a deprotonated N atom and the carboxylate O atom of the orotate ligand and four aqua ligands in a distorted octahedral geometry. Intermolecular N-H…O and O-H…O hydrogen bonds produce R₂²(8), R₂²(12), R₂²(16), R₃²(8), R₄³(8) and R₄⁴(12) rings, which lead to a one-dimensional polymeric chains. An extensive three-dimensional network of N-H…O and O-H…O hydrogen bonds, π-π and N-H…π interactions are responsible for crystal stabilization.