New Monoiodoacetate Complexes of Uranyl: Synthesis and Structure

The crystals of (CN3H6)3[UO2(mia)3]2(NO3) (I) and (CN3H6)3[UO2(mia)3]2(OH) (II), where mia is the monoiodoacetate ion CH2ICOO–, were synthesized and studied by IR spectroscopy, thermogravimetric analysis, and X-ray diffraction. The uranyl-containing [UO2(mia)3]– complexes in the structures of I and II are described by the crystal chemical formula A(B01)3, where A = UO_2^2 + , B01 = mia. The non-covalent interactions in the crystals of I were analyzed by the method of molecular Voronoi–Dirichlet polyhedra. Considering the available published data, it was found that the nature of the iodine-containing carboxylate ions (aliphatic or aromatic) does not affect the geometric characteristics (d(I⋅⋅⋅O) and ∠C–I⋅⋅⋅O) of the non-covalent interactions involving iodine atoms.