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- Q498946 subject Q7213730.
- Q498946 subject Q8221180.
- Q498946 abstract "An isodesmic reaction is a chemical reaction in which the type of chemical bonds broken in the reactant are the same as the type of bonds formed in the reaction product. This type of reaction is often used as a hypothetical reaction in thermochemistry.An example of an isodesmic reaction isCH3− + CH3X → CH4 + CH2X− (1)X = F, Cl, Br, IEquation 1 describes the deprotonation of a methyl halide by a methyl anion. The energy change associated with this exothermic reaction which can be calculated in silico increases going from fluorine to chlorine to bromine and iodine making the CH2I− anion the most stable and least basic of all the halides. Although this reaction is isodesmic the energy change in this example also depends on the difference in bond energy of the C-X bond in the base and conjugate acid. In other cases, the difference may be due to steric strain. This difference is small in fluorine but large in iodine (in favor of the anion) and therefore the energy trend is as described despite the fact that C-F bonds are stronger than C-I bonds.The related term homodesmotic reaction also takes into account orbital hybridization and in addition there is no change in the number of carbon to hydrogen bonds.".
- Q498946 wikiPageWikiLink Q1103.
- Q498946 wikiPageWikiLink Q11193.
- Q498946 wikiPageWikiLink Q183410.
- Q498946 wikiPageWikiLink Q192572.
- Q498946 wikiPageWikiLink Q193086.
- Q498946 wikiPageWikiLink Q2014867.
- Q498946 wikiPageWikiLink Q2356542.
- Q498946 wikiPageWikiLink Q2686738.
- Q498946 wikiPageWikiLink Q274511.
- Q498946 wikiPageWikiLink Q2914535.
- Q498946 wikiPageWikiLink Q36496.
- Q498946 wikiPageWikiLink Q36534.
- Q498946 wikiPageWikiLink Q3774480.
- Q498946 wikiPageWikiLink Q4407.
- Q498946 wikiPageWikiLink Q44424.
- Q498946 wikiPageWikiLink Q60661.
- Q498946 wikiPageWikiLink Q650.
- Q498946 wikiPageWikiLink Q688.
- Q498946 wikiPageWikiLink Q7213730.
- Q498946 wikiPageWikiLink Q7913889.
- Q498946 wikiPageWikiLink Q8221180.
- Q498946 wikiPageWikiLink Q879.
- Q498946 comment "An isodesmic reaction is a chemical reaction in which the type of chemical bonds broken in the reactant are the same as the type of bonds formed in the reaction product. This type of reaction is often used as a hypothetical reaction in thermochemistry.An example of an isodesmic reaction isCH3− + CH3X → CH4 + CH2X− (1)X = F, Cl, Br, IEquation 1 describes the deprotonation of a methyl halide by a methyl anion.".
- Q498946 label "Isodesmic reaction".