Ionic solvation—Part 8. Silver(I) solvation and stability of its complex with cryptand 222 in aprotic mixed solvents

✍ Scribed by Andrzej Lewandowski; Iwona Dajksler

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 455 KB
• Volume: 37
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(92)87029-y

✦ Synopsis

Al&met--The stability constants, K, of silver(I) complex with cryptand 222, studied in 18 aprotic binary mixed solvents A + B, are presented together with the standard potentials, E", of the couple Ag/Ag+. The experimentally evaluated stability constants and potentials have been correlated with the mixed solvents composition by applying a coordination model of ionic solvation. The correlation parameters obtained may be assigned to the overall formation constants of the solvato-complex, defined by the equation Ag+A,+iB& Ag+A,_,B, Taking a value of n = 4 for silver(I) solvation number, the correlation parameters pi were obtained from a curve fitting procedure, using the equation r -I Q,,=Q,-nlogx,-lo BL where Qas represents the 1ogK or E"/59 mV values measured in the mixture, Q, stands for the corresponding values measured in pure solvent A and x, and xs are mole fractions of the mixed solvent components A and B, respectively.