Simple theoretical models for elimination reactions on polar catalysts; The reactivity of halogeno-, hydroxy-, amino- and mercaptopropane

1982 ◽  
Vol 47 (8) ◽  
pp. 2180-2189 ◽  
Author(s):  
Jiří Sedláček
Keyword(s):  
Theoretical Models ◽  
Molecular Orbitals ◽  
Localized Molecular Orbitals ◽  
Hydroxy Amino ◽  
Elimination Reactions ◽  
Simple Models

CNDO/2 calculations have been made for simple models of the adsorption of (CH3)2CHZ molecules (Z = Cl, OH, NH2, and SH) on the surface of polar catalysts. The results of these calculations and their interpretation by the method of configuration analysis in terms of uniformly localized molecular orbitals made it possible to explain satisfactorily a series of experimental facts. The mechanism and stereoselectivity of the reaction as well as reactivity trends for the series of the molecules studied are discussed.

Simple theoretical models for elimination reactions on polar catalysts; Generalization of reactivities in series of chloroalkanes, alcohols, amines and thiols

1982 ◽  
Vol 47 (7) ◽  
pp. 1911-1922 ◽  
Author(s):  
Jiří Sedláček
Keyword(s):  
Experimental Data ◽  
Reaction Mechanism ◽  
Quantum Chemical ◽  
Theoretical Models ◽  
In Series ◽  
Elimination Reactions ◽  
Simple Models

CNDO/2 calculations have been made for simple models od adsorption of chloroalkane, alcohol, amine and thiol molecules on the surface of polar catalysts. The calculated values of selected quantum chemical quantities describing the properties of Cα-X and Cβ-HA bonds were correlated with reported experimental reactivities. Very good correlations with experimental data were obtained for quantum chemical quantities relating to the Cα-X bond. The results of calculations are discussed in relation to the reaction mechanism and the type of surface catalytic centres participating in the reaction.

Simple theoretical models of elimination reactions on polar catalysts; Dehydration reactivity of secondary alcohols on acidic and basic catalysts

1985 ◽  
Vol 50 (4) ◽  
pp. 920-929 ◽  
Author(s):  
Jiří Sedláček
Keyword(s):  
Experimental Data ◽  
Quantum Chemical ◽  
Theoretical Models ◽  
Aliphatic Alcohols ◽  
Secondary Alcohols ◽  
Carbonium Ion ◽  
Dehydration Reactions ◽  
Aromatic Alcohols ◽  
Basic Catalysts ◽  
Simple Models

CNDO/2 calculations for simple models of adsorption and dehydration reactions of secondary aliphatic and aromatic alcohols on polar catalysts are presented. The models involve selected stages of elimination mechanisms of various types (E1, E2 and E1cB elimination). Calculated quantum chemical quantities were correlated with reported experimental data. It is shown that reactivities for the series of substituted phenylethanols correlate very well with the ease of carbonium ion formation. In the case of aliphatic alcohols, calculated quantities correlate generally with the reactivities on SiO2 and are in anticorrelation with the reactivities on Al2O3.NaOH.

Unitary Optimization of Localized Molecular Orbitals

2013 ◽  
Vol 9 (12) ◽  
pp. 5365-5372 ◽  
Author(s):  
Susi Lehtola ◽  
Hannes Jónsson
Keyword(s):  
Molecular Orbitals ◽  
Localized Molecular Orbitals

ChemInform Abstract: THE GAUCHE EFFEKT, A STUDY OF LOCALIZED MOLECULAR ORBITALS AND EXCITED-STATE GEOMETRIES IN FCH2OH

1973 ◽  
Vol 4 (40) ◽  
Author(s):  
SAUL WOLFE ◽  
LUIS M. TEL ◽  
W. J. HAINES ◽  
M. A. ROBB ◽  
I. G. CSIZMADIA
Keyword(s):  
Excited State ◽  
Molecular Orbitals ◽  
Localized Molecular Orbitals
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