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  • Several possible scales of steric effects of the alkyl groups were suggested on the basis of isodesmic model reactions, in which a sterically crowded compound is formally synthesized from simpler derivatives. The reaction energies were calculated within the framework of the density functional theory at the level B3LYP/6-311+G(d.p)//B3LYP/6-311+G(d.p) for 6 model systems and 7 various alkyl groups. The most important systems were cis-1,2-dialkylcyclopropanes 1 synthesized from two mono derivatives and sterically crowded derivatives of bicyclo[2.2.2]octane 2 with C3 symmetry. The scales of steric effects evaluated from the two models were rather different: the first scale depended in effect only on the C atoms in the and positions and the effects were almost equal for all primary alkyls. The second scale depended also on the position and the effect of the CH2-t-Bu group was much greater than that of the ethyl group. Any relationship between various systems was found rarely, only in the case of very s
  • Several possible scales of steric effects of the alkyl groups were suggested on the basis of isodesmic model reactions, in which a sterically crowded compound is formally synthesized from simpler derivatives. The reaction energies were calculated within the framework of the density functional theory at the level B3LYP/6-311+G(d.p)//B3LYP/6-311+G(d.p) for 6 model systems and 7 various alkyl groups. The most important systems were cis-1,2-dialkylcyclopropanes 1 synthesized from two mono derivatives and sterically crowded derivatives of bicyclo[2.2.2]octane 2 with C3 symmetry. The scales of steric effects evaluated from the two models were rather different: the first scale depended in effect only on the C atoms in the and positions and the effects were almost equal for all primary alkyls. The second scale depended also on the position and the effect of the CH2-t-Bu group was much greater than that of the ethyl group. Any relationship between various systems was found rarely, only in the case of very s (en)
  • Several possible scales of steric effects of the alkyl groups were suggested on the basis of isodesmic model reactions, in which a sterically crowded compound is formally synthesized from simpler derivatives. The reaction energies were calculated within the framework of the density functional theory at the level B3LYP/6-311+G(d.p)//B3LYP/6-311+G(d.p) for 6 model systems and 7 various alkyl groups. The most important systems were cis-1,2-dialkylcyclopropanes 1 synthesized from two mono derivatives and sterically crowded derivatives of bicyclo[2.2.2]octane 2 with C3 symmetry. The scales of steric effects evaluated from the two models were rather different: the first scale depended in effect only on the C atoms in the and positions and the effects were almost equal for all primary alkyls. The second scale depended also on the position and the effect of the CH2-t-Bu group was much greater than that of the ethyl group. Any relationship between various systems was found rarely, only in the case of very s (cs)
Title
  • Steric effects of the alkyl groups: evaluation on isolated molecules by means of isodesmic reactions
  • Steric effects of the alkyl groups: evaluation on isolated molecules by means of isodesmic reactions (en)
  • Steric effects of the alkyl groups: evaluation on isolated molecules by means of isodesmic reactions (cs)
skos:prefLabel
  • Steric effects of the alkyl groups: evaluation on isolated molecules by means of isodesmic reactions
  • Steric effects of the alkyl groups: evaluation on isolated molecules by means of isodesmic reactions (en)
  • Steric effects of the alkyl groups: evaluation on isolated molecules by means of isodesmic reactions (cs)
skos:notation
  • RIV/60461373:22340/07:00019335!RIV08-MSM-22340___
http://linked.open.../vavai/riv/strany
  • 2081-2086
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • Z(MSM6046137301)
http://linked.open...iv/cisloPeriodika
  • 5
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 452497
http://linked.open...ai/riv/idVysledku
  • RIV/60461373:22340/07:00019335
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • steric effects; isodesmic model reactions; DFT; cis-1; 2-dialkylcyclopropanes (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV
  • [EE9CA036A095]
http://linked.open...i/riv/nazevZdroje
  • Organic and Biomolecular Chemistry
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 2007
http://linked.open...iv/tvurceVysledku
  • Böhm, Stanislav
  • Exner, Otto
http://linked.open...n/vavai/riv/zamer
issn
  • 1477-0520
number of pages
http://localhost/t...ganizacniJednotka
  • 22340
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