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3 edition of Substituent effects in radical chemistry found in the catalog.

Substituent effects in radical chemistry

by NATO Advanced Research Workshop on Substituent Effects in Radical Chemistry (1986 Louvain-la-Neuve, Belgium)

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  • 25 Currently reading

Published by D. Reidel Pub. Co., Distributed in the U.S.A. and Canada by Kluwer Academic Publishers in Dordrecht, Boston, Norwell, MA, U.S.A .
Written in English

    Subjects:
  • Radicals (Chemistry) -- Congresses.

  • Edition Notes

    Statementedited by Heinz G. Viehe, Zdenek Janousek, and Robert Merényi.
    SeriesNATO ASI series. Series C, Mathematical and physical sciences ;, vol. 189, NATO ASI series., no. 189.
    ContributionsViehe, Heinz Günter., Janousek, Zdenek., Merényi, Robert.
    Classifications
    LC ClassificationsQD471 .N287 1986
    The Physical Object
    Paginationxiv, 482 p. :
    Number of Pages482
    ID Numbers
    Open LibraryOL2724241M
    ISBN 109027723400
    LC Control Number86017895

    Title: Theory of Substituent Effects: Recent Advances VOLUME: 10 ISSUE: 7 Author(s):O. Exner and S. Bohm Affiliation:Department of OrganicChemistry, Prague Institute of Chemical Technology, 28 Praha 6, CzechRepublic. Keywords:basicities, Gas-Phase Acidities, Enthalpy, Quantum Chemical Calculations, Inductive Effect Abstract: The review reports recent progress in the studies of substituent Cited by: William Adcock, Transmission of polar substituent effects across the cubane ring system: 19F substituent chemical shifts (SCS) of 4‐substituted (X) cub‐1‐yl fluorides revisited, Journal of Physical Organic Chemistry, 22, 11, (), ().Cited by:

    1. Experimentally Observed Conformations. The conformational analysis of pyranosyl radicals is an extensively studied topic that con­tains surprising results. 6,14,23–26 The most striking of these is that conversion of some protected D-glu­copyranosyl derivatives, such as the brom 6 into the corresponding D-gluco­pyran­osyl radicals causes the conformation of the system to. Substituent effects such as the σ parameters in the Hammett equation can also be estimated. Although a calculation of changes in the charge distribution might seem to be a promising method for that purpose, it was found that calculated 19 F shielding values (“virtual NMR experiments”) yielded much more convincing : Burkhard Kirste.

    The Ring Opening of 3-Substituted Cyclobutene Radical Cations David J. Swinarski and Olaf Wiest* Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana [email protected] Received J The substituent effects on the ring-opening reaction of cyclobutene radical cations have been studied. We have investigated the influence of electron density on the three-center [N–I–N]+ halogen bond. A series of [bis(pyridine)iodine]+ and [1,2-bis((pyridineylethynyl)benzene)iodine]+ BF4– complexes substituted with electron withdrawing and donating functionalities in the para-position of their pyridine nitrogen were synthesized and studied by spectroscopic and computational by:


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Substituent effects in radical chemistry by NATO Advanced Research Workshop on Substituent Effects in Radical Chemistry (1986 Louvain-la-Neuve, Belgium) Download PDF EPUB FB2

The Different Recombinations of Diphenyl Methyl Radicals Ph2 C Degrees-R, R = tBu, CN, COOR', COR'.- Some Chemistry of Radical Ions.- Substituent Effects on the Methylenecyclopropane Rearrangement. A Probe for Free Radical Effects.- 2-Oxomorpholinyl Radicals.- Azoalkane Decompositions as Measures of Radical Substituent.

A Theoretical Approach to Substituent Effects in radical Chemistry -- 2. Sigma and Pi Effects in Radicals -- 3. The Contrasting Strain Energies of Small Ring Carbon and Silicon Rings.

The Relationship with Free Radical Energies -- 4. Allylic and Allenic Capto-dative Stabilization in Nitrogen Centered Free Radicals -- 5. Substituent Effects in Radical Chemistry.

Editors: Viehe, Heinz G., Janousek, `This book as a top level scientific kaleidoscope is recommended to all organic chemists and related researchers who wish to know and apply the results of the modern radical chemistry. Anyone who would like to participate in the exciting further development of.

ESR-Spectroscopical Investigation of Capto-Dative Substituent Effects in Benzyl Radicals H.-G. Korth, P. Lommes, R. Sustmann, L.

Sylvander, L. Stella Pages Find many great new & used options and get the best deals for Nato Science Series C: Substituent Effects in Radical Chemistry (, Hardcover) at the best online prices at.

Tetrahedron Letters No, pp. Pergamon Press. Printed in Great Britaih. SUBSTITUENT EFFECTS AND FREE RADICAL STABILITY. THE METHOXY GROUP Jack W. Timberlake and Melvin L, Hodges Department of Chemistry, Louisiana State University in New Orleans New Orleans, Louisiana (Received in USA 4 September ; received in 13K for publication Cited by: The captodative effect is the stabilization of radicals by a synergistic effect of an electron-withdrawing substituent and an electron-donating substituent.

The name originates as the electron-withdrawing group (EWG) is sometimes called the "captor" group, whilst the electron-donating group (EDG) is the "dative" substituent. Olefins with this substituent pattern are sometime described as.

Abstract. In this paper we make a survey of various aspects of radical chemistry to which we have made some contribution. Our Localized Molecular Orbital (LMO) approach to the electronic structure and react vity of chemical species allowed us to generalize the Linnett theory and to describe the mechanism of various processes involving free by: Radical Substituent Effects of α-Sulfonium Groups Jin-Pei Cheng *, Bo Liu, and Xian-Man Zhang * Department of Chemistry, Nankai University, Tianjin,People's Republic of China, and Department of Chemistry, Wesleyan University, Middletown, Connecticut Cited by: The substituent effect on the 5-(π-exo)exo cyclization has been estimated by the relative rate constants, k R, calculated for several substituents in the 4- and 3-position.

Results show that stabilization and polar factors slightly affect the rate of the vinyl radical cyclization onto arene rings, which appears to be rather unselective with Cited by: Understanding the role of substituents is of great importance for the preparation of novel phenolic compounds with enhanced antioxidative properties.

In this work, the antioxidative activity of isoflavonoid derivatives with different substituents placed at the C2 position was determined by density functional theory (DFT) calculations. The bond dissociation enthalpy (BDE), ionization potential Cited by: 3.

\(^1\)J. Hine, Structural Effects on Equilibria in Organic Chemistry, Wiley-Interscience, New York,p. This book offers a very broad coverage of quantitative correlations of substituent effects on processes as diverse as radical formation and rates of rotation around single \(\ce{C-C}\) bonds.

In organic chemistry and biochemistry, substituent is the name for a single atom or for a group of atoms that take the position of another atom in a replace this atom. This reaction is called a substitution atom or group of atoms that gets replaced is called the leaving group.

The terms substituent, side chain, group, branch, or pendant group are used in the same. ♥ Book Title: Substituent Effects in Radical Chemistry ♣ Name Author: Heinz G.

Viehe ∞ Launching: Info ISBN Link: ⊗ Detail ISBN code: ⊕ Number Pages: Total sheet ♮ News id: T1fi2zcEQsMC Download File Start Reading ☯ Full Synopsis: "'This book as a top level scientific kaleidoscope is recommended to all organic chemists and related.

To illustrate the repercussions on the biological activity resulting from substituent effects, we will successively study the effects of methyl groups, of unsaturated groups, and of halogen substitution.

Hydroxy groups, thiols, and acidic or basic functions will be discussed more briefly. These effects are a combination of RESONANCE and INDUCTIVE effects (see next page) The effects are also important in other reactions and properties (e.g.

acidity of the substituted benzoic acids).Here are some general pointers for recognising the substituent effects. The H atom is the standard and is regarded as having no effect.; Activating groups increase the rate.

/ Hg ‘satellite’ features have been resolved in electron paramagnetic resonance (EPR) spectra recorded from radical cations of diphenylmercury and its bis-ortho-allyloxy derivatives as isolated in solid freon matrices at 77 accord with our previous work, we confirm that the parent radical cation of diphenylmercury is a σ-species with substantial electron loss from the C–Hg.

A series of β-methanesulfonate phenethyl radicals bearing a range of electron donating and withdrawing aromatic substituents were generated and studied in a variety of solvent mixtures using nanosecond laser flash photolysis.

Rate constants for the formation of the corresponding styrene radical cation via he. chemistry and properties of another part of the same molecule.

Substituent Effects (A) When the part of the molecule that we vary is a discrete atom or molecular fragment, we call it a substituent.

Substituent effects are the changes on a reaction or property in the unchanged part of the molecule resulting from substituent variation. Substituent effects on the rates and equilibria of organic reactions are of two types: a) Steric Effects. Steric substituent effects arise from the size (i.e., space requirements) of the substituent and the fact that strong forces of repulsion result when two atoms are forced to.

The work presented here is a result of an extended collaboration with a number of coworkers and guests. Particularly, I would like to thank Dr. P. Burkhard and Dr. W. Strub for their careful work performed for their Ph. D. thesis and Dr.

M. Heming for his brilliant ideas and his dedication. VeryBrand: Springer-Verlag Berlin Heidelberg.About this book Progress in Physical Organic Chemistry is dedicated to reviewing the latest investigations into organic chemistry that use quantitative and mathematical methods.

These reviews help readers understand the importance of individual discoveries and what they mean to the field as a whole.Free Radical Addition and Substitution Reactions III.

Conjugation, Electronic Effects, Carbonyl Groups Conjugated and Aromatic Molecules Carbonyl Compounds. Ketones, Aldehydes, and Carboxylic Acids Substituent Effects Carbonyl Compounds.

Esters, Amides, and Related Molecules IV. Carbonyl and Pericyclic Reactions and File Size: 2MB.