Abstract
Two new vanadium phosphates (NH4)5[C4N3H16]2[NH3(CH2)2NH3]2[PV 18 IV O46]·H2O (1) and [C4N3H16]4[(PV 12 IV V 6 V O46)(PO4)]·H2O (2) have been successfully synthesized under hydrothermal conditions and structurally characterized by elemental analysis, infrared (IR), thermogravimetry (TG), and single-crystal X-ray diffraction. Compound 1 crystallizes in the monoclinic system, space group P21/n, a = 13.183(8), b = 20.148(13), c = 22.273(14) A, β = 102.198(8)°, V = 5,782(6) A3, Z = 4; compound 2 crystallizes in the monoclinic system, space group C2/c, a = 23.917(2), b = 12.9647(12), c = 20.1922(19) A, β = 105.382(1)°, V = 6,036.9(10) A3, Z = 4. Magnetic susceptibility measurements reveal antiferromagnetic interactions between V4+ atoms of 1 and 2.
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