Two organically templated niobium and zinconiobium fluorophosphates:: Low temperature hydrothermal syntheses of NbOF(PO4)2(C2H10N2)2 and Zn3(NbOF)(PO4)4(C2H10N2)2

Two new niobium and zinconiobium fluorophosphates, NbOF(PO4)(2)(C2H10N2)(2) (1) and Zn-3(NbOF)(PO4)(4)-(C2H10N2)(2) (2), have been prepared under hydrothermal conditions using ethylenediamine as a template. The structures were determined by single crystal diffraction to be triclinic, space group P(1) over bar (No. 2), a = 8.1075 (6) angstrom, b = 9.8961 (7) angstrom, c = 10.1420(8) angstrom, alpha = 111.655(1)degrees, beta = 111.51(1)degrees, gamma = 93.206(1)degrees, V = 686.19(9) angstrom(3), and Z = 2 for 1 and orthorhombic, space group Fddd (No. 70), a = 9.1928(2) A, b = 14.2090(10) angstrom, c = 32.2971 (6) angstrom, V = 4218.66(12) angstrom(3), and Z = 8 for 2, respectively. Compound 1 is an infinite linear chain consisting of corner-sharing [Nb2P2] 4-MRs bridged at the Nb centers with organic amines situated between chains, and compound 2, containing the chains similar to that in 1, forms a zeotype framework with organic amines situated in the gismondine-type [4(6)8(4)] cavities. The topology of 2 was previously unknown with vertex symbol 4.4.4.4.8.8 (vertex 1), 4.4.4.8(2).8.8 (vertex 2), 4.4.8.8.8(2).8(2) (vertex 3), and 4.4.4.8(2) (.)8.8 (vertex 4). The topological relationships between the 4-connected network of 2 and several reported (3,4)-connected networks were discussed.