Recent Progress in Extraction Agents Based on Cobalt Bis(Dicarbollides) for Partitioning of Radionuclides from High-Level Nuclear Waste

The cobalt bis(dicarbollide)(1-) ion [(1,2-C2B9H12)2-3,3′-Co](1-) (CD−) was synthesized and described by Hawthorne (1965); however, its use as a perfect hydrophobic anion was awaited until 1976 when at ™rst its extraction properties were published. The cobalt bis(dicarbollide) belongs to a class of the

19.1 Introduction ..........................................................................................................................463 19.2 Synergists and CCD− ............................................................................................................466