Contribution to the thermodynamics of complexes of alkali metal cations with dibenzo-18-crown-6 in water-nitrobenzene extraction system

Abstract

The stability constants for the ML+ complex species, where M+ is an alkali metal cation and L is dibenzo-18-crown-6, in nitrobenzene saturated with water were calculated by employing published equilibrium data. The stability is found to increase in the cation order Li+ < Cs+ < Rb+ < K+ < Na+. For the NaL+, KL+, RbL+, and CsL+ complex cations the individual extraction constants in the water-nitrobenzene system were determined; their values increase in the series Na+ < K+ < Rb+ < Cs+.

Interaction of the divalent lead cation with cyclosporin A: an experimental and theoretical study

“…From the results of our previous papers [20,21], it follows that the two-phase water-Pb(NO 3 ) 2 -nitrobenzene-1 (cyclosporin A)-Sr(DCC) 2 extraction system (see ''Experimental'' section), chosen for determination of the stability constant of the cationic complex 1ÁPb 2? in nitrobenzene saturated with water, can be characterized by the main chemical equilibrium…”

A combined experimental and DFT study on the complexation of H3O+ with beauvericin

“…Previous results [5,[12][13][14][15][16] indicated that the two-phase waterHCl/nitrobenzene-NaDCC-1 (beauvericin) extraction system (see ''Experimental''), chosen for determination of the stability constant of the cationic complex 1ÁH 3 O ? in nitrobenzene saturated with water, can be characterized by the main chemical equilibrium (Eq.…”

Cooperative interaction of protonated 1,4-diazabicyclo[2.2.2]octane with a hexaarylbenzene-based receptor: an experimental and theoretical study

“…Furthermore (referring to [31,[54][55][56]), for the exchange extraction constants K ex (HL ? , Cs ? )…”

“…= 0.4. Previous results [31,[54][55][56] indicated that the two-phase water-HL ? Cl -/nitrobenzene-CsDCC-1 (HAB-based receptor) extraction system (see ''Experimental''), which was chosen to determine the stability constant of the cationic complex 1ÁHL ?…”