Ml. Dietz et al., Ligand reorganization energies as a basis for the design of synergistic metal ion extraction systems, CHEM COMMUN, (13), 1999, pp. 1177-1178
In the extraction of alkaline earth cations by acidic organophosphorus extr
actants, a correlation has been demonstrated between the effectiveness of t
he stereoisomers of dicyclohexano-18-crown-6 as synergists and the strain e
nergy associated with conversion of the unbound crown ether to its complexe
d form.