resonance stabilization वाक्य
उदाहरण वाक्य
मोबाइल
- Nevertheless, the principle behind resonance stabilization is the same in both cases.
- Especially when there is more than one major contributor, the resonance stabilization is high.
- Reduction in resonance stabilization of pyrimidines may lead to addition and ring cleavage reactions rather than substitutions.
- Similar tautomeric rearrangement and pi-resonance stabilization would then give the ion some degree of stability.
- These rings are very stable due to resonance stabilization, so they are difficult to break down.
- One explanation for the increased acidity over alcohols is resonance stabilization of the phenoxide anion by the aromatic ring.
- Resonance stabilization, however, enables weaker bases such as carboxylates; for example, sodium acetate is a weak base.
- This effect is due to a number of factors including increased resonance stabilization and solvation of the products relative to the reactants.
- Due to its resonance stabilization, the peptide bond is relatively unreactive under physiological conditions, even less than similar compounds such as esters.
- Esters exhibit less resonance stabilization than amides, so the formation of a tetrahedral intermediate and subsequent loss of resonance is not as energetically unfavorable.
- Anhydrides experience even weaker resonance stabilization, since the resonance is split between two carbonyl groups, and are more reactive than esters and amides.
- This occurs typically in compounds such as resonance stabilization are usually very strong, or superbases, which cannot exist in a water solution due to the acidity of water.
- When adjacent to the phenyl ring the amine group,-NH 2-, is in resonance stabilization and therefore becomes more acidic and a result less reactive as a base.
- The resonance stabilization of thiophene is 29 kcal / mol ( 121 kJ / mol ) compared to 20 kcal / mol ( 84 kJ / mol ) for the oxygen analogue furan.
- Where Q is the measure of reactivity of monomer via resonance stabilization, and e is the measure of polarity of monomer ( molecule or radical ) via the effect of functional groups on vinyl groups.
- This intermediate tends to revert to the amide form, expelling the attacking group, since the amide form is usually favored by free energy, ( presumably due to the strong resonance stabilization of the peptide group ).
- The recombination of the electron and hole, i . e . the decay of the exciton, is limited by resonance stabilization due to the overlap of the electron and hole wave functions, resulting in an extended lifetime for the exciton.
- In another variation the reagent is the imidazole 1, 1'- thiocarbonyldiimidazole ( TCDI ), for example in the total synthesis of pallescensin B . TCDI is especially good to primary alcohols because there is no resonance stabilization of the xanthate because the nitrogen lonepair is involved in the aromatic sextet.
- Thus, while most organic acids are deprotonated by the ionization of a polar hydrogen oxygen bond, usually accompanied by some form of resonance stabilization ( resulting in a carboxylate ion ), uric acid is deprotonated at a nitrogen atom and uses a tautomeric hydroxy group as an electron-withdrawing group to increase the p " K " 1 value.
- Secondly, since many types of compounds can function as an acid and a base, then what is the point of their K a when you might not even be using water as the solvent ? ( Granted, I am in chapter 1 of my organic chemistry book and it only devotes only 7 pages to the following topics : " Arrhenius Acids / Bases, Bronsted-Lowry Acids / Bases & acid Strength, acid-dissociation constant, base strength, structural effects on Acidity including electronegativity, size, & resonance stabilization, Lewis Acids / Bases " and I finally ditched my chemistry book and taught myself from Wikipedia and am getting every question right on practice tests ! ) If I'm wrong, then please correct me because I absolutely loved the explanation of acids / bases under this Solvent-system definition and that's why I'm so curious to resolve my anxiety.
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