Crystal structure of (C2H7N4O)2[UO2(C2O4)2(H2O)

Abstract

The single crystals of (C2H7N4O)2[UO2(C2O4)2(H2O)] were studied by X-ray diffraction. The crystals are monoclinic, space group Pn, Z = 2, unit cell parameters: a = 9.4123(2) A, b = 8.4591(2) A, c = 11.8740(3) A, β = 105.500(10)°, V = 911.02(4) A3. The main structural units of the crystals of I are islet complex groups [UO2(C2O4)2(H2O)]2− corresponding to the crystal chemical group AB 2 01 M1 (A = UO UO 2 2+ , B01 = C2O 4 2− , M = H2O) of uranyl complexes. Uranium-containing mononuclear complexes are connected into a three-dimensional framework through the electrostatic interactions and hydrogen bonding system involving carbamyolguanidinium ions.