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  2. Molecularity - Wikipedia

    en.wikipedia.org/wiki/Molecularity

    After the initial bimolecular collision of A and B an energetically excited reaction intermediate is formed, then, it collides with a M body, in a second bimolecular reaction, transferring the excess energy to it. [7] The reaction can be explained as two consecutive reactions:

  3. Reaction mechanism - Wikipedia

    en.wikipedia.org/wiki/Reaction_mechanism

    An example of a simple chain reaction is the thermal decomposition of acetaldehyde (CH 3 CHO) to methane (CH 4) and carbon monoxide (CO). The experimental reaction order is 3/2, [4] which can be explained by a Rice-Herzfeld mechanism. [5] This reaction mechanism for acetaldehyde has 4 steps with rate equations for each step :

  4. Solvent effects - Wikipedia

    en.wikipedia.org/wiki/Solvent_effects

    The rate equation for S N 2 reactions are bimolecular being first order in Nucleophile and first order in Reagent. The determining factor when both S N 2 and S N 1 reaction mechanisms are viable is the strength of the Nucleophile. Nuclephilicity and basicity are linked and the more nucleophilic a molecule becomes the greater said nucleophile's ...

  5. Collision theory - Wikipedia

    en.wikipedia.org/wiki/Collision_theory

    The reason for this is that particles have been supposed to be spherical and able to react in all directions, which is not true, as the orientation of the collisions is not always proper for the reaction. For example, in the hydrogenation reaction of ethylene the H 2 molecule must approach the bonding zone between the atoms, and only a few of ...

  6. Temperature jump - Wikipedia

    en.wikipedia.org/wiki/Temperature_Jump

    The two rate constants can be determined from the values of () and the equilibrium constant : = /, yielding two equations for two unknowns. In more complex reaction networks, when multiple reaction steps are perturbed, then the reciprocal time constants are given by the eigenvalues of the characteristic rate equations. The ability to observe ...

  7. Rate equation - Wikipedia

    en.wikipedia.org/wiki/Rate_equation

    The exponents, which can be fractional, [6] are called partial orders of reaction and their sum is the overall order of reaction. [7] In a dilute solution, an elementary reaction (one having a single step with a single transition state) is empirically found to obey the law of mass action. This predicts that the rate depends only on the ...

  8. Biginelli reaction - Wikipedia

    en.wikipedia.org/wiki/Biginelli_reaction

    The reaction mechanism of the Biginelli reaction is a series of bimolecular reactions leading to the desired dihydropyrimidinone. [14]According to a mechanism proposed by Sweet in 1973 the aldol condensation of ethylacetoacetate 1 and the aryl aldehyde is the rate-limiting step leading to the carbenium ion 2.

  9. Reaction rate constant - Wikipedia

    en.wikipedia.org/wiki/Reaction_rate_constant

    where A and B are reactants C is a product a, b, and c are stoichiometric coefficients,. the reaction rate is often found to have the form: = [] [] Here ⁠ ⁠ is the reaction rate constant that depends on temperature, and [A] and [B] are the molar concentrations of substances A and B in moles per unit volume of solution, assuming the reaction is taking place throughout the volume of the ...