Synthesis and Structure of New Glutarate-Containing U(VI), Np(V), and Pu(VI) Compounds

Abstract

The structures of three new glutarate-containing compounds have been characterized. These compounds are (CN3H6)2[(UO2)2(C5H6O4)3] · 4H2O (I), (CN3H6)4[(NpO2)2(C5H6O4)3] · 12H2O (II), and [PuO2(C5H6O4)(H2O)] (III), where C5H6O$$_{4}^{{2 - }}$$ are glutarate anions and CN3H$$_{6}^{ + }$$ are guanidium cations. It was established that the structures of crystals I and II contain [(AnO2)2(C5H6O4)3]z– layers (An = U(VI) or Np(V) and z = 2 or 4, respectively), which can be described by the A2Q$$_{3}^{{02}}$$ crystallochemical formula, where A is UO$$_{2}^{{2 + }}$$ or NpO$$_{2}^{ + }$$ and Q02 are glutarate ions. The structure of crystal III contains two interpenetrating [PuO2(C5H6O4)(H2O)] frameworks and can be described by the AQ21M1 crystallochemical formula, where A = PuO$$_{2}^{{2 + }}$$, Q21 = C5H6O$$_{4}^{{2 - }}$$, and М1 = H2O. The influence of topological isomerism on the structures of the glutarate-containing complexes belonging to the A2Q023 and AQ21M1 crystallochemical groups was discussed.