Diaquabis(propane-1,3-diamine)nickel(II) bis(propane-1,3-diamine)disulfatonickelate(II)

Abstract

The ionic NiIItitle complex, [Ni(C3H10N2)2(H2O)2][Ni(SO4)2(C3H10N2)2], is built up of [Ni(dipr)2(H2O)2]2+complex cations and [Ni(dipr)2(SO4)2]2−complex anions (dipr is propane-1,3-diamine). Both NiIIatoms display a slightly distorted octahedral coordination and are located on inversion centers. There are several types of hydrogen-bonding interactions, which connect complex cations and anions into a two-dimensional network parallel to (010). Hydrogen bonds formed by the axially coordinated water molecule of the complex cation and one of the O atoms of the sulfate groups of the complex anion (first type) link them into chains along thecaxis. These chains are linked to each other through hydrogen bonds formed by an O atom (second type) of the SO4groups and NH2groups of the ligand of the complex cations from neighboring chains, forming a two-dimensional hydrogen-bonded net perpendicular to thebaxis. The third type of O atoms of the sulfate groups of the complex anion are also linked into chains by a combination of both previously described types of H-atom connections.