Synthesis and structure of the complex of uranyl citraconate with urea

Abstract

Crystals of [UO₂(C₅H₄O₄)(urea)₂], where C₅H₄O₄^2– is citraconate ion, were prepared and studied by IR spectroscopy and single crystal X-ray diffraction. The structure of the crystals is formed by chains having the same composition as the compound as a whole and belonging to the crystal-chemical group AТ¹¹M₂¹ (A = UO₂²⁺, Т¹¹ = C₅H₄O₄^2–, M¹ = urea) of uranyl complexes. Comparative analysis of nonvalent interactions in the structures of uranyl complexes with citraconate ions was performed by the method of molecular Voronoi–Dirichlet polyhedra.