Zn3(HPO3)4•Zn(H2O)6:: a purely inorganic open-framework zincophosphite with octahedral zinc complex [Zn(H2O)6]2+ encapsulating in the channels

The hydrothermal synthesis and single crystal structure of Zn-3(HPO3)(4) . Zn(H2O)(6) are reported. The structure is built-up from vertex linking ZnO4 tetrahedral and HPO3 pseudo-pyramids units, giving rise to a three-dimensional framework with large 8, 16-membered ring channels. The zincophosphite is purly inorganic with the octahedral zinc complex filled in the channel. The synthesis of system required the presence of the organic amine which is not incorporated into the structure of the product. The framework-metal complex encapsulating in the channel is the first time appeared in open-framework zincophospates and zincophosphites. Crystal data: Zn-3(HPO3)(4).Zn(H2O)(6), M = 689.52, orthorhombic, Fddd (No. 70), a = 9.679(4) Angstrom b = 11.926(5) Angstrom, c = 30.691(12) Angstrom V = 3543(2)Angstrom Z = 8; rho(cacl) = 2.585 Mg/m(3), mu = 5.798 cm(-1), R = 0.02651 R-w = 0.0406. (C) 2004 Elsevier Inc. All rights reserved.