Research Article: Tetra­aqua­tetra­manganese(II) catena-[germanodihydroxidodi(hydrogen­phosphate)diphosphate]

Date Published: May 01, 2012

Publisher: International Union of Crystallography

Author(s): Xin Zhang, Lei Wen, Hong-Ming Chen, Jin-Xiao Mi, Ya-Xi Huang.


The title compound, Mn4(H2O)4[Ge(OH)2(HPO4)2(PO4)2], was synthesized by the solvothermal method. Its crystal structure is isotypic with the iron and cobalt analogues [Huang et al. (2012 ▶). Inorg. Chem.51, 3316–3323]. In the crystal structure, the framework is built from undulating manganese phosphate sheets parallel to (010) inter­connected by GeO6 octa­hedra (at the inversion center), resulting in a three-dimensional network with eight-membered ring channels into which all the protons point. The undulating manganese phosphate sheet consists of zigzag manganese octa­hedral chains along [10-1], built from MnO4(OH)(OH2) octa­hedra and MnO5(OH2) octa­hedra by sharing their trans or skew edges, which are inter­connected by PO3(OH) and PO4 tetra­hedra via corner-sharing. The crystal structure features extensive O—H⋯O hydrogen-bonding inter­actions.

Partial Text

For background to germanophosphates, see: Brock et al. (1998 ▶); Corma (1997 ▶); Li et al. (2000 ▶); Liu, Yang, Wang et al. (2008 ▶); Liu, Yang, Zhang et al. (2008 ▶); Zhao et al. (2009 ▶); Zubieta (1994 ▶). For isotypic structures of the FeII and CoII analogues, see: Huang et al. (2012 ▶).