Synthesis and Structure of Uranyl Succinate Complexes with Cyanoguanidine and Diethylacetamide

Abstract

[UO₂(suc)(C₂N₄H₄)₂] · 2H₂O (I) and [UO₂(Deaa)₄(H₂О)][(UO₂)₂(C₄H₄O₄)₃] · 2Deaa (II) crystals (suc^2– is succinate ion, C₂N₄H₄ is cyanoguanidine, and Deaa is N,N-diethylacetamide С₆Н₁₃NO) have been synthesized, and their IR spectroscopy and X-ray diffraction analysis have been performed. It is established that the I structure is formed by chains belonging to the crystallochemical group AQ⁰²M\(_{2}^{1}\) (A = UO\(_{2}^{{2 + }}\), Q⁰² = suc^2–, M¹ = C₂N₄H₄) of uranyl complexes. The II structure contains two types of complex groups: one-core cations [UO₂(Deaa)₄(H₂О)]²⁺ and layered anions [(UO₂)₂(suc)₃]^2–, with the corresponding crystallochemical formulas AM\(_{5}^{1}\) and A₂Q\(_{3}^{{02}}\) (A = UO\(_{2}^{{2 + }}\), M¹ = Deaa and Н₂О, Q⁰² = suc^2–). The nonvalent interactions in structure II and its carbamide-containing analog are analyzed by the method of molecular Voronoi–Dirichlet polyhedra.