The first di-cadmium-substituted vanadoarsenate derived from α-{As8V14O42} shell

Two di-cadmium-substituted vanadoarsenates, [Cd(enMe)3]2{α-[(enMe)2Cd2As8V12O40(0.5H2O)]}·5.5H2O (1, enMe=1,2-diaminopropane) and [Cd(enMe)2]2{β-[(enMe)2Cd2As8V12O40(0.5H2O)]} (2), were hydrothermally synthesized and characterized by elemental analyses, IR, TGA, UV–Vis, XRD, magnetic measurements and single crystal structural analyses. Crystal data for 1: monoclinic, P2(1)/c, a=15.040(9) Å, b=20.288(12) Å, c=27.873(17) Å, β=98.046(8)°, V=8421.3(19) Å3, Z=4; for 2: monoclinic, P2(1)/n, a=12.753(3) Å, b=19.334(5) Å, c=14.310(3) Å, β=99.984(3)°, V=3475.1(14) Å3, Z=2. X-ray diffraction analyses reveal that compounds 1 and 2 exhibit isolated and one-dimensional inorganic–organic hybrid structures, respectively. The former is the first di-cadmium-substituted vanadoarsenate derived from α-{As8V14O42} shell, while the latter is another kind of di-cadmium-substituted vanadoarsenate derived from β-{As8V14O42} shell. Variable temperature susceptibility measurements demonstrate the presence of antiferromagnetic interactions between VIV cations in 1 and 2.