C. Vinas et al., NEW POLYETHER-SUBSTITUTED METALLACARBORANES AS EXTRACTANTS FOR CS-137AND SR-90 FROM NUCLEAR WASTES, Inorganic chemistry, 37(14), 1998, pp. 3640
Carbon-substituted derivatives of [3,3'-Co(1-CH3-2-(CH2)(3)OR-1,2-C2B9
H9)(2)](-) incorporating lipophilic ether chains (5, R = -CH2CH3; 6, R
= -(CH2)(2)OCH3; 7, R = -(CH2)(3)CH3) have been synthesized. A proced
ure involving the simultaneous partial degradation and the ether forma
tion ;on 1-CH3-2-(CH2)(3)Cl-1,2-C2B10H10 (1) has been developed. Extra
ction tests have been carried out for Cs-137, Sr-90, and Eu-152. Compl
ex H[7] proved to have the best efficiency in the transport of Cs-137
at pH = 3 and an excellent selectivity in the presence of Sr-90 and Eu
-152.