Diaqua­NN′-bis­(2-pyridylmethyl­ene)propane-13-diaminemanganese(II) dibromide–aqua­bromidoNN′-bis­(2-pyridylmethyl­ene)propane-13-diaminemanganese(II) bromide–dibromidoNN′-bis­(2-pyridylmethyl­ene)propane-13-diaminemanganese(II) (1/2/1)

摘要

There are three different Mn^II complexes in the asymmetric unit of the title compound, [Mn(C15H16N4)(H2O)2]Br2·2{[MnBr(C15H16N4)(H2O)]Br}·[MnBr2(C15H16N4)]. In the neutral complex, the Mn²⁺ ion is six-coordinated in a distorted octa­hedral environment by four N atoms of the tetra­dentate ligand N,N′-bis­(2-pyridylmethyl­ene)propane-1,3-diamine (bppd) and two bromide ligands. In the two cationic complexes, the Mn²⁺ ions are also six-coordinated in similar environments, but one Mn ion is coordinated by four N atoms of bppd, one Br atom and one O atom of a coordinating water mol­ecule, whereas the other Mn ion is coordinated by four N atoms of bppd and two O atoms of water ligands. The complexes with two coordinated Br atoms or two H2O ligands are disposed about a twofold axis through Mn and C atoms with the special positions (, y, 0) and (0, y, ), respectively. The compound displays inter­molecular O—H⋯Br hydrogen bonding. There are inter­molecular π–π inter­actions between adjacent pyridine rings, with centroid–centroid distances of 3.822 and 3.833 Å, and a C—H⋯O inter­action is also present.