Abstract
The synthesis and properties of representative lanthanide dithionates are described and their potential use as catalysts discussed on the basis of dissociation of the coordinated dithionate in the presence of phosphoryl ligands. Complex formation with triphenylphosphine oxide has been studied and a number of complexes isolated. The infrared spectra of all compounds indicate coordination of the dithionate ion to the metal. The X-ray structures of Nd 2(S 2O 6) 3 · 14H 2O ( R1 = 0.0209 for 3368 diffractometer observed reflections) and Nd 2(S 2O 6) 3-(Ph 3PO) 4 · 8H 2O ( R1 = 0.1088 for 5406 diffractometer observed reflections) confirm the coordination of the dithionate with one previously unreported coordination mode, and show a polymeric structure for Nd 2(S 2O 6) 3 · 14H 2O whilst Nd 2(S 2O 6) 3(Ph 3PO) 4 · 8H 2O is a hydrogen bonded dimer.
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