Zobrazeno 1 - 10 of 21 pro vyhledávání: '"Leonard S. Levitt"'
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The Alkyl Inductive Effect. I. Relations between σI*, σ* and ρI ρ* for H and Alkyl Groups; σI Values from the Size and Branching of R
Autor: Leonard S. Levitt
Publikováno v: Zeitschrift für Naturforschung B. 34:81-85
For alkyl groups it is shown that new inductive substituent constants, σI (R), can be calculated accurately from previously obtained polar substituent constants, σ*(R), from the simple relation σI(R) = σI (Me) [I-2σ* (R)]. In similar fashion, th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1c1efae227af924c3a57a5f9ea333c0f
https://doi.org/10.1515/znb-1979-0117
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4
The Alkyl Inductive Effect, II Theoretical Calculation of Inductive Parameters
Autor: Harry F. Widingand, Leonard S. Levitt
Publikováno v: Zeitschrift für Naturforschung B. 34:321-326
Three models of alkyl groups, “derealization”, “through-the-bond”, and “electric field” models, are presented, all of which enable the calculation of σI (R) from first principles, and excellent agreement is demonstrated for the calculate
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8857a2d84f0cbca857e2341655b187df
https://doi.org/10.1515/znb-1979-0236
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5
Inductive Effects on Molecular Ionization Potentials, XVIII Alkylpyridines and Alkylthiophenes. Molecular Orbital Calculations on Alkylbenzenes and Alkylpyridines
Autor: Leonard S. Levitt, Cyril Párkányi
Publikováno v: Zeitschrift für Naturforschung B. 32:1160-1164
Models of alkylbenzenes were treated by the HMO and SCF—MO methods and excellent linear correlations were found between the experimental ionization potentials, EI, and the energies of the highest occupied π-molecular orbitals calculated by the abo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::326c9c9574c6644d1e2ad016a4b99e30
https://doi.org/10.1515/znb-1977-1013
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7
Extreme Pressures. II. Volume‐Temperature Relationship for Gases
Autor: Leonard S. Levitt
Publikováno v: The Journal of Chemical Physics. 34:1440-1443
It is found, using Bridgman's data for H2O, N2, and Ar, that the V‐T isobars, though curved at medium pressures, become good straight lines at the same higher pressures for which the isothermal relation p = CeB/V begins to hold (above 1000 kg/cm2 f
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::392e501ce6ca3b212a1ab18a7517e932
https://doi.org/10.1063/1.1731758
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Plný text Recenzováno Digitální knihovna AV ČR
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