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Distribution equilibrium of penicillin G between water and organic solutions of Amberlite LA-2

✍ Scribed by Ruey-Shin Juang; Yuh-Sheng Lin

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
479 KB
Volume
62
Category
Article
ISSN
0923-0467

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✦ Synopsis

Equilibrium studies on the distribution of penicillin G between aqueous solutions and Ambedite LA-2 (a secondary amine) in mixtures of n-butyl acetate and kerosene were made in the temperature range 288-308 K. Experiments were performed as a function of aqueous pH, penicillin G concentration in the aqueous phase, and amine concentration in the organic phase. The composition of the complex present in the organic phase and the equilibrium constant for the formation of this complex were numerically determined at different temperatures. In addition, the apparent enthalpy and entropy for complexation reaction were calculated.

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## Abstract The behaviour of the cyclic trimeric V^V^ complex [V~3~O~3~(μ‐O)~3~(dmpp)~3~(H~2~O)](H~2~O)~2~, V~3~L~3~, (L = Hdmpp = 3‐hydroxy‐1,2‐dimethyl‐4‐pyridinone) was studied in methanol and methanol/water solutions by using ^51^V and 1D‐ and 2D ^1^H NMR spectroscopy. Red crystals, isolated fr