μ-Acetato-aqua-μ-(5-bromo-2-{1,3-bis[2-(5-bromo-2-oxidobenzylideneamino)ethyl]imidazolidin-2-yl}phenolato)methanoldinickel(II) methanol disolvate monohydrate

Abstract

The crystal structure of the title compound, [Ni2(C27H24Br3N4O3)(CH3CO2)(CH3OH)(H2O)]·2CH3OH·H2O contains [L(OAc){(CH3OH)Ni}{(H2O)Ni}] molecules {H3L = 2-(5-bromo-2-hydroxyphenyl)-1,3-bis[4-(5-bromo-2-hydroxyphenyl)-3-azabut-3-enyl]-1,3-imidazolidine} with additional water and two methanol solvent molecules. In this instance, one of the two Ni atoms is coordinated to a water and the other to a methanol molecule. The Ni—O and Ni—N distances, as well as the angles about the metal atoms, show quite regular octahedra around the central ions. The Ni—Ophenol—Ni and Ni—Oacetate—Ni angles are not similar [95.26 (13) and 97.34 (13)°, respectively], indicating that this subtle solvate exchange induces significant differences in the conformation adopted. The coordinated methanol ligand is involved in an intramolecular hydrogen bond to the uncoordinated O atom of the bridging acetate ligand, while the coordinated water molecule forms a hydrogen bond with the one of the methanol solvent molecules. The water solvent molecule forms strong hydrogen bonds to both phenolate O atoms. The remaining methanol solvent molecule also forms a hydrogen bond with this solvent water molecule.