Organically templated uranium(IV) fluorooxalates with layer structures:: (H4TREN)[U2F6(C2O4)3]•4H2O (TREN = tris(2-aminoethyl)amine) and (H4APPIP)[U2F6(C2O4)3]•4H2O (APPIP=1,4-bis(3-aminopropyl)piperazine)

Two organically-templated layered uranium(IV) fluorooxalates, (H4TREN)[U2F6(C2O4)(3)] center dot 4H(2)O ( 1) (TREN = tris(2-aminoethyl) amine) and (H(4)APPIP)[U2F6(C2O4)(3)] center dot 4H(2)O ( 2) (APPIP = 1,4-bis(3-aminopropyl) piperazine), have been synthesized by hydrothermal methods and structurally characterized by single-crystal X-ray diffraction, thermogravimetric analysis, and magnetic susceptibility. Both structures consist of anionic [U2F6(C2O4)(3)] 4- layers separated by organic ammonium cations and lattice water molecules. The UF3O6 polyhedra are connected by oxalate ligands in different ways within the layers. They are the first examples of organically-templated uranium fluorooxalates. Crystal data for compound 1 follow: monoclinic, P2(1)/c ( No. 14), a = 19.1563( 5) angstrom, b = 8.9531(2) angstrom, c = 16.6221( 4) angstrom, beta = 114.633(1)degrees, and Z = 4. Crystal data for compound 2 are the same as those for 1 except a = 10.3309(8) angstrom, b = 15.564(1) angstrom, c = 17.537(1) angstrom, and beta = 95.430(4)degrees.