enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. SN2 reaction - Wikipedia

    en.wikipedia.org/wiki/SN2_reaction

    In the S N 1 reaction the nucleophile attacks after the rate-limiting step is over, whereas in S N 2 the nucleophile forces off the leaving group in the limiting step. In other words, the rate of S N 1 reactions depend only on the concentration of the substrate while the S N 2 reaction rate depends on the concentration of both the substrate and ...

  3. Nucleophilic substitution - Wikipedia

    en.wikipedia.org/wiki/Nucleophilic_substitution

    The rate equation for this reaction would be Rate=k[Sub][Nuc]. For a S N 2 reaction, an aprotic solvent is best, such as acetone, DMF, or DMSO. Aprotic solvents do not add protons (H + ions) into solution; if protons were present in S N 2 reactions, they would react with the nucleophile and severely limit the reaction rate.

  4. File:Sn2 reaction IBO IRC.pdf - Wikipedia

    en.wikipedia.org/wiki/File:Sn2_reaction_IBO_IRC.pdf

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us

  5. Rate-determining step - Wikipedia

    en.wikipedia.org/wiki/Rate-determining_step

    In chemical kinetics, the overall rate of a reaction is often approximately determined by the slowest step, known as the rate-determining step (RDS or RD-step [1] or r/d step [2] [3]) or rate-limiting step. For a given reaction mechanism, the prediction of the corresponding rate equation (for comparison with the experimental rate law) is often ...

  6. Solvent effects - Wikipedia

    en.wikipedia.org/wiki/Solvent_effects

    This difference arises from acid/base reactions between protic solvents (not aprotic solvents) and strong nucleophiles. While it is true that steric effects also affect the relative reaction rates, [12] however, for demonstration of principle for solvent polarity on S N 2 reaction rates, steric effects may be neglected.

  7. Concerted reaction - Wikipedia

    en.wikipedia.org/wiki/Concerted_reaction

    In chemistry, a concerted reaction is a chemical reaction in which all bond breaking and bond making occurs in a single step. Reactive intermediates or other unstable high energy intermediates are not involved. [1] [2] Concerted reaction rates tend not to depend on solvent polarity ruling out large buildup of charge in the transition state.

  8. Williamson ether synthesis - Wikipedia

    en.wikipedia.org/wiki/Williamson_ether_synthesis

    This reaction was developed by Alexander Williamson in 1850. [2] Typically it involves the reaction of an alkoxide ion with a primary alkyl halide via an S N 2 reaction. This reaction is important in the history of organic chemistry because it helped prove the structure of ethers. The general reaction mechanism is as follows: [3]

  9. Rate equation - Wikipedia

    en.wikipedia.org/wiki/Rate_equation

    In chemistry, the rate equation (also known as the rate law or empirical differential rate equation) is an empirical differential mathematical expression for the reaction rate of a given reaction in terms of concentrations of chemical species and constant parameters (normally rate coefficients and partial orders of reaction) only. [1]