Solvent and substituent effects on aggregation constants of perylene bisimide π-stacks – a linear free energy relationship analysis

2012 ◽  
Vol 10 (30) ◽  
pp. 5845 ◽  
Author(s):  
Zhijian Chen ◽  
Benjamin Fimmel ◽  
Frank Würthner
Keyword(s):  
Free Energy ◽  
Substituent Effects ◽  
Linear Free Energy Relationship ◽  
Perylene Bisimide ◽  
Relationship Analysis ◽  
Linear Free Energy

Linear Free Energy Relationship Analysis of Solvent Effects on Singlet Oxygen Reactions

2003 ◽  
Vol 7 (9) ◽  
pp. 799-819 ◽  
Author(s):  
Else Lemp ◽  
Antonio Zanocco ◽  
Eduardo Lissi
Keyword(s):  
Free Energy ◽  
Singlet Oxygen ◽  
Solvent Effects ◽  
Linear Free Energy Relationship ◽  
Relationship Analysis ◽  
Linear Free Energy

Linear Free Energy Relationship Analysis of Retention Factors in Cerasome Electrokinetic Chromatography Intended for Predicting Drug Skin Permeation

2011 ◽  
Vol 100 (8) ◽  
pp. 3105-3113 ◽  
Author(s):  
Keda Zhang ◽  
Ming Chen ◽  
Gerhard K.E. Scriba ◽  
Michael H. Abraham ◽  
Alfred Fahr ◽  
...  
Keyword(s):  
Free Energy ◽  
Skin Permeation ◽  
Linear Free Energy Relationship ◽  
Electrokinetic Chromatography ◽  
Retention Factors ◽  
Relationship Analysis ◽  
Linear Free Energy

Substituent Effects on the Chymotrypsin-Catalyzed Hydrolysis of Specific Ester Substrates

1971 ◽  
Vol 49 (2) ◽  
pp. 210-217 ◽  
Author(s):  
R. E. Williams ◽  
M. L. Bender
Keyword(s):  
Free Energy ◽  
Rate Constants ◽  
Substituent Effects ◽  
Phenyl Group ◽  
Linear Free Energy Relationship ◽  
Acylation Reaction ◽  
General Base ◽  
Linear Free Energy ◽  
Base Mechanism ◽  
Hydrolysis Of

The substituent effect on the chymotrypsin-catalyzed hydrolysis of several phenyl esters of specific substrates has been studied. The second-order acylation rate constants (kcat/Km(app)) obey a linear free energy relationship with ρ = +0.63 for phenyl hippurates and ρ = +0.46 for phenyl N-benzyloxycarbonyl-L-tryptophanates when substituents are introduced into the phenyl group of the ester function. These results further support the previously proposed general acid – general base mechanism for the acylation reaction and the formation of a tetrahedral intermediate in the course of the reaction.

Substituent effects in naphthalene. III. Saponification of 6- and 7-substituted Methyl 2-naphthoates and application of the Hammett equation

1966 ◽  
Vol 19 (2) ◽  
pp. 221 ◽  
Author(s):  
PR Wells ◽  
W Adcock
Keyword(s):  
Free Energy ◽  
Alkaline Hydrolysis ◽  
General Feature ◽  
Substituent Effects ◽  
Linear Free Energy Relationship ◽  
Reaction Centre ◽  
Hammett Equation ◽  
P Values ◽  
Linear Free Energy ◽  
Aromatic Systems

The rates of alkaline hydrolysis in 70% v/v aqueous dioxan at 25� have been determined for the 6-and 7-NO2, 6- and 7-CN, 6- and 7-F, 6- and 7-Cl, 6- and 7-NMe2, 6-Me and 6-OMe substituted methyl 2-naphthoates, methyl 2- naphthoate, m-NO2, p-NO2, p-Me substituted methyl benzoates, and methyl benzoate. An examination of the application of the Hammett equation reveals that this linear free energy relationship applies with high precision but that it yields different p values for different substituent-reaction centre dispositions. This may be a general feature for all aromatic systems although in many cases the differences are not larger than the experimental uncertainties.

Estimation of Water−Organic Interfacial Tensions. A Linear Free Energy Relationship Analysis of Interfacial Adhesion

1997 ◽  
Vol 101 (38) ◽  
pp. 7488-7493 ◽  
Author(s):  
Adilson A. Freitas ◽  
Frank H. Quina ◽  
Felix A. Carroll
Keyword(s):  
Free Energy ◽  
Interfacial Adhesion ◽  
Linear Free Energy Relationship ◽  
Interfacial Tensions ◽  
Relationship Analysis ◽  
Linear Free Energy

scholarly journals Partition of solutes from the gas phase and from water to wet and dry di-n-butyl ether: a linear free energy relationship analysis

2001 ◽  
Vol 3 (17) ◽  
pp. 3732-3736 ◽  
Author(s):  
Michael H. Abraham ◽  
Andreas M. Zissimos ◽  
William E. Acree, Jr.
Keyword(s):  
Free Energy ◽  
Gas Phase ◽  
Linear Free Energy Relationship ◽  
Butyl Ether ◽  
Relationship Analysis ◽  
Linear Free Energy

scholarly journals Linear Free-Energy Relationship Analysis of a Catalytic Desymmetrization Reaction of a Diarylmethane-bis(phenol)

2010 ◽  
Vol 12 (12) ◽  
pp. 2794-2797 ◽  
Author(s):  
Jeffrey L. Gustafson ◽  
Matthew S. Sigman ◽  
Scott J. Miller
Keyword(s):  
Free Energy ◽  
Linear Free Energy Relationship ◽  
Relationship Analysis ◽  
Linear Free Energy
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