Synthesis and crystal structures of uranium (VI) and thorium (IV) complexes with picolinamide and malonamide

Calixarene-based picolinamides and malonamides are among the promising extracting ligands for selective separation of minor actinides. However, the understanding of coordination chemistry of actinide ions with simple picolinamide- and malonamide-type ligands is still far from comprehensive. In this work, we report the first two picolinamide coordinated uranium (VI) and thorium (IV) complexes with different 1D polymeric structures as well as a malonamide coordinated uranium (VI) molybdate with a 2D layered structure.