Synergistic effect of pyridine bases on the solvent extraction of manganese(II) with 2-thenoyltrifluoroacetone - Kawamoto, H.; Akaiwa, H. (Elsevier)
Synergistic effects of pyridine bases(B) on the extraction of Mn(II)-thenoyltrifluoroacetonate(MnT"2) into benzene have been studied. The results show that the synergism is attributable to the formation and preferential extraction of the 1:2 adduct, MnT"2B"2 and that stabilities of the resulting adducts decrease with the following order: γ-picoline 〉 pyridine 〉 α-picoline 〉 quinoline.The main factors affecting the stability of the adduct were considered to be base strength of the synergist and steric effect of its substituent. The above order does not agree with the observed trend in low pH region, in which destruction of synergism caused by protonation of a base might occur.
http://dx.doi.org/10.1016/0022-1902(68)80167-8
Keywords: V; ZP