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metal-organic compounds
In the title complex, [Mn(C4HBrO4)(C12H8N2)2(H2O)]·H2O, the MnII atom has a distorted octahedral coordination geometry formed by two bidentate phenanthroline (phen) molecules, one bromomaleate dianion and one water molecule. The large Mn—O—C bond angle of 143.31 (17)° implies poor overlap between the atomic orbitals of manganese and those of the carboxyl O atom, but despite this the Mn—O bond distance of 2.0574 (16) Å is short, suggesting a substantial electrostatic interaction in this bond. The overlapped arrangement and short face-to-face distances of 3.368 (5) and 3.501 (11) Å between neighboring parallel phen planes show π–π stacking in the crystal structure.
organic compounds
In the crystal of the title compound, 2C9H8NO+·C4H2Br2O42−·2C4H4Br2O4, the dibromosuccinate dianion and dibromosuccinic acid molecules each lie on an inversion center. They interact via hydrogen bonding. The hydroxyquinolinium cations are hydrogen bonded to both the dibromosuccinate anion and dibromosuccinic acid molecules. The overlapped arrangement and short face-to-face distance of 3.431 (17) Å indicate the existence of π–π stacking between hydroxyquinolinium rings in the crystal structure.
metal-organic compounds
The crystal structure of the title compound, [Ni(C12H8N2)3](C4H2Br2O4)·7H2O, consists of discrete nickel(II) complex cations, dibromosuccinate dianions and uncoordinated water molecules. The NiII atom is surrounded by three phenanthroline ligands in a distorted octahedral geometry. The overlapped arrangement and short face-to-face distances of 3.525 (12) and 3.369 (5) Å between parallel phen planes of neighboring complexes indicate π–π stacking. The dibromosuccinate dianions are located on inversion centers and are linked to uncoordinated water molecules via hydrogen bonds.
metal-organic compounds
The title compound, [Ni(C3H4N2)5(H2O)](C4H2Br2O4), consists of NiII complex cations and dibromosuccinate anions. The Ni atom, water O atom and one imidazole N atom of the complex cation lie on a twofold axis. The anion lies on an inversion centre. The crystal packing is reinforced by O—H
O and N—HO hydrogen bonds, but there are no π–π stacking interactions even though the complex contains five aromatic imidazole rings. The compound is isostructural with its cobalt analogue.
O and N—HO hydrogen bonds, but there are no π–π stacking interactions even though the complex contains five aromatic imidazole rings. The compound is isostructural with its cobalt analogue.
