Association constants of 1:1 and 2:1 molecular complexes from spectrophotometric data; experimental design and reliability of the parameters

1986 ◽  
pp. 371 ◽  
Author(s):  
Gino Carta ◽  
Guido Crisponi
Keyword(s):  
Experimental Design ◽  
Molecular Complexes ◽  
Association Constants ◽  
Spectrophotometric Data

scholarly journals Association of Thymolsulfonephthalein and Cresolsulfonephthalein Anions with Cationic Cyanines in Aqueous Solution

2010 ◽  
Vol 4 (4) ◽  
pp. 271-276
Author(s):  
Serghiy Shapovalov ◽  
◽  
Yana Kiseliova ◽  
Keyword(s):  
Aqueous Solution ◽  
Enthalpy Of Formation ◽  
Association Constants ◽  
Semiempirical Methods ◽  
Solution Equilibrium ◽  
Spectrophotometric Data ◽  
The Enthalpy Of Formation ◽  
Quinaldine Red

The formation of associates between one- or two-charged anions of sulfonephthalein dyes – thymolsulfonephthalein, cresolsulfonephthalein – and cyanine cations (pinacyanol, quinaldine red) has been considered in aqueous solution. Equilibrium association constants have been determined using spectrophotometric data. By semiempirical methods the enthalpy of formation and the eventual structure of ions and associates have been established.

Hydrogen bonding in chloroform-thioether systems: An N.M.R. spectroscopic study

1974 ◽  
Vol 27 (2) ◽  
pp. 287 ◽  
Author(s):  
KW Jolley ◽  
LM Hughes ◽  
ID Watson
Keyword(s):  
Hydrogen Bonding ◽  
Spectroscopic Study ◽  
Molecular Complexes ◽  
Association Constants ◽  
Enthalpies Of Formation ◽  
Dimethyl Sulphide ◽  
Excess Enthalpies ◽  
Temperature Range ◽  
Enthalpies Of Mixing ◽  
The Ideal

The association constants of molecular complexes of chloroform with dimethyl sulphide, diethyl sulphide, tetrahydrothiophen and thiophen have been obtained by the use of N.M.R. spectroscopy over a temperature range from -50 to +50�C. The enthalpies of formation have been found from these results and used in the ideal associated model to predict the excess enthalpies of mixing.

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