Synthesis, structure, and magnetism of CN3H6•VO(H2O)(HPO4)(H2PO4)•H2O, a new guanidinium vanadium(IV) phosphate

The solution-phase synthesis, single crystal structure, and some physical properties of CN3H6. VO(H2O)(HPO4) (H2PO4). H2O, a new guanidinium vanadium (IV) hydrogen phosphate hydrate, are reported. This phase is built up from one-dimensional chains of VO5(H2O) octahedra and (H-2/H)PO4 tetrahedra and fused together via V-O-P linkages. These chains are arranged in "crisscross" configuration from layer to layer. Guanidinium cations and water molecules are arrayed in the interchain regions and link the chains together through a hydrogen bonding network. Magnetic susceptibility data for this phase are also reported. Crystal data: CN3H6. VO(H2O)(HPO4) (H2PO4). H2O, M-r=356.02, monoclinic, space group C2/c (No. 15), a = 13.956(2) Angstrom, b = 11.717(2) Angstrom, c = 13.961(2) Angstrom, beta = 94.47(1)degrees, V = 2276.1(5) Angstrom(3), Z = 8, R = 2.95%, R-w = 3.27% [170 parameters, 2537 observed reflections with I>3 sigma(I)]. (C) 1999 Academic Press.