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 (H2/H)PO4tetrahedra 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,Mr=356.02, monoclinic, space groupC2/c(No. 15),a= 13.956(2) ?,b=11.717(2) ?,c=13.961(2) ?,BETA=94.47(1)°,V=2276.1(5) ?3,Z=8,R=2.95%,Rw=3.27% [170 parameters, 2537 observed reflections withI>3SIGMA (I)].