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Effect of Substituted Pyridine Co-Ligands and (Diacetoxyiodo)benzene Oxidants on the Fe(III)-OIPh-Mediated Triphenylmethane Hydroxylation Reaction. [PDF]

Molecules
Török P, Kaizer J.
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Hammett Equation and Generalized Pauling's Electronegativity Equation

Journal of Chemical Information and Computer Sciences, 2004
Substituent interaction energy (SIE) was defined as the energy change of the isodesmic reaction X-spacer-Y + H-spacer-H --> X-spacer-H + H-spacer-Y. It was found that this SIE followed a simple equation, SIE(X,Y) = -ksigma(X)sigma(Y), where k was a constant dependent on the system and sigma was a certain scale of electronic substituent constant. It was
Lei, Liu, Yao, Fu, Rui, Liu, Rui-Qiong, Li, Qing-Xiang, Guo   +4 more
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The basicity of phosphines and the hammett equation

Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 1962
1. We have shown the applicability of the Hammett equation to the basicity constants of phosphines. 2. We have calculated the values for the constant a for p-C8H17, cyclo-C6H11, and CH2CH2CN substituents on phosphorus.
M. I. Kabachnik, G. A. Balueva
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A Reëxamination of the Hammett Equation.

Chemical Reviews, 1953
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Some Extensions of Hammett's Equation

Science, 1953
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Hammett equation and micellar effects upon deacylation

Journal of the Chemical Society, Perkin Transactions 2, 1994
Substituent effects upon second order rate constants of reaction of OH– with phenyl p-substituted benzoates at surfaces of micelles of cetyltrialkylammonium bromide (alkyl = Me, Et, Pr and Bu) and tetradecylquinuclidinium bromide fit the Hammett equation. Values of ρ increase with increasing bulk of the surfactant head group and are considerably larger
BARTOLETTI A., BARTOLINI S., GERMANI, Raimondo, SAVELLI, Gianfranco, BUNTON C. A.   +4 more
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Application of Hammett equation to arylazopyrazoles

Proceedings of the Indian Academy of Sciences - Section A, 1976
AE#= Pn,Fax where ux is substituent constant. In figure 1 is shown the dependence of the half wave potential of 3, 5-dimethyl-4-substituted arylazopyrazoles with Hammett constant at pH 4.0. Ortho substituted methoxy and ethoxy groups show deviation due to the steric hindrance and field effects.
Wahid U. Malik, R. N. Goyal
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Plurilinear improvement of the Hammett equation

Journal of Physical Organic Chemistry, 1995
AbstractThe original Hammett equation, Δ = ρσ, is transformed in a constrained tetralinear relationship where each straight line with variable intercept term correlates one of the following four groups or subsets of dipolar substituents: normal and special substituents (depending on the absence or the presence of a lone electron pair in their atom next
João Carlos R. Reis, Manuel A. P. Segurado, Jaime D. Gomes De Oliveira   +2 more
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Use of the Hammett equation in substituted thiophenes

J. Chem. Soc., Perkin Trans. 2, 1985
The application of multivariate statistics to linear free-energy relationships in the thiophene series increases the understanding of the Hammett equation. Principal components analysis shows that α-substituted thiophenes require the σ constants used for para-substituted benzene derivatives, owing to a strict proportionality of the substituent effects ...
ALUNNI, S, CLEMENTI, S, EBERT, C, LINDA, P, MUSUMARRA, Giuseppe, SJOSTROM, M, WOLD, S.   +6 more
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