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, [Ni 2(C 27H 24Br 3N 4O 3)(CH 3CO 2)(CH 3OH)(H 2O)] ·2CH3OH·H 2O contains [L(OAc){(CH 3OH)Ni} {(H 2O)Ni}] molecules {H 3 L = 2-(5-bromo-2-Hydroxy-phen-yl) -1,3-bis-[4-(5-bromo-2-hydroxyphenyl)-3-azabut-3-en-yl]-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 octa-hedra around the central ions. The Ni-Ophenol-Ni and Ni-O acetate-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 intra-molecular 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.