A vanadyl phosphate containing a new member of tancoite-like single chain,(DAPH2)[VIVO(HPO4)2]·xH2O(x≈0.2,DAP=1,3-diaminopropane,C3H10N2),has been synthesized under hydro(solvo)thermal conditions.It crystallizes in orthorhombic space group P21212(No.18)with a=7.1730(14),b=19.252(4),c=8.6557(17),Z=4,V=1195.3(4)3,C3H14.38N2P2VO9.19,Mr=338.47,Dc=1.881 g/cm3,μ(MoKα)=1.138 mm–1and F(000)=692.The final full-matrix least-squares refinement converged to R=0.0408,wR=0.1046 for 2498 observed reflections with I>2(I)and R=0.0456 and wR=0.1080 for all data(2750)and S=1.001.Its one-dimensional structure consists of tancoite-like1{VIVO(HPO4)2}2–single chains surrounded by DAPH22+ions and water molecules.The single chain is built from trans-corner-sharing octahedral{VIV=O···VIV}backbone loop-branched by HPO4groups like staple forming a new member of tancoite single chain.Due to the special coordination of VIVO6,the1{VO(HPO4)2–}chain adopts a larger M–O–M angle(V–O–V=135o)than those of tancoite chains reported before.The corner-sharing linear{VIV=O···VIV}chain structure also leads to a one-dimensional weak antiferromagnetic interaction at low temperature.The magnetic measurements confirm the 4+valence state of vanadium.IR and TG results of the title compound are also discussed.
