Diaquabis{[1-hydroxy-2-(1H-imidazol-3-ium-1-yl)ethane-1,1-diyl]bis(hydro gen phosphonato)}manganese(II)

作者：Zhang Zai Chao^*; Li Rong Qing; Zhang Yu

来源：Acta Crystallographica Section E-Structure Reports Online, 2009, 65(12): M1701-U1717.

DOI：10.1107/S160053680905065X

In the title compound, [Mn(C(5)H(9)N(2)O(7)P(2))(2)(H(2)O)(2)], the Mn(II) atom (site symmetry 1) is coordinated by four phosphonate O atoms from a pair of partially deprotonated 1-hydroxy-2-(imidazol-3-yl) ethane-1,1-bisphophonic acid ligands (imhedpH(3)(-)) and two water molecules, resulting in a slightly distorted trans-MnO(6) octahedral geometry for the metal ion. In the ligands, the imidazole units are protonated and two of the hydroxy O atoms of the phosphonate groups are deprotonated and chelate the Mn(II), thus forming the neutral molecule of the title compound. The two protonated O atoms within the phosphonate groups of one imhedpH(3)(-) ligand act as hydrogen-bond acceptors for a bifurcated hydrogen bond originating from the coordinated water molecule. The phosphonate units of neigboring molecules are connected with their equivalents in neighboring molecules via two types of inversion-symmetric hydrogen-bonding arrangements with four and two strong O-H center dot center dot center dot O hydrogen bonds, respectively. The two interactions connect molecules into infinite chains along [111] and [110], in combination forming a tightly hydrogen-bonded three-dimensional supramolecular network. This network is further stabilized by additional hydrogen bonds between the protonated imidazole units and one of the coordinated P-O O atoms and by additional O-H center dot center dot center dot O hydrogen bonds between the water molecules and the P=O O atoms of neigboring molecules.

• 出版日期2009-12
• 单位淮阴师范学院