Y. Takeda, Yoshimasa Wada, S. Fujiwara
Dec 1, 1981
Citations
0
Influential Citations
34
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
Benzo-15-crown-5 (B15C5) extracted alkali metal picrates (MA) into benzene by forming M(B15C5)A or M(B15C5)2A complexes and moreover, in the presence of tributyl phosphate (B), B15C5 extracted rubidium and caesium picrates by forming M(B15C5)BA complexes. The extractability sequences of the M(B15C5)A, M(B15C5)2A, and M(B15C5)BA complexes are Na+>K+>Rb+>Li+>Cs+,K+>Rb+>Cs+>, and Rb+>Cs+ respectively. The extraction equilibrium constants for these complexes have been determined at 25 °C, and the synergistic formation constants of the M(B15C5)2A and M(B15C5)BA complexes in the benzene solution have been calculated. The synergistic effects for the alkali metal ions for the B15C5 system were compared with those for the 15C5 system.