chemistry, a reaction intermediate, or intermediate, is a molecular entity arising within the sequence of a stepwise chemical reaction. It is formed...

a reactive intermediate or an intermediate is a short-lived, high-energy, highly reactive molecule. When generated in a chemical reaction, it will quickly...

a reaction intermediate is a reaction product that serves as a precursor for other reactions A reactive intermediate is a highly reactive reaction intermediate...

cationic intermediate loses a proton to give an allylic alcohol (4). With an excess of formaldehyde and a low reaction temperature the reaction product...

than that of the intermediate. Instead, the rate equation may be more accurately described using steady-state kinetics. The reaction involves a carbocation...

intermediates (see next section) or other quantitative and qualitative characteristics of the reaction. It also describes each reactive intermediate,...

equilibration of Wittig intermediates and termed the process "stereochemical drift". For many years, the stereochemistry of the Wittig reaction, in terms of carbon-carbon...

reaction in which a reaction intermediate (or, for the first step, the reactants) is converted into the next reaction intermediate (or, for the last step...

Shapiro reaction or tosylhydrazone decomposition is an organic reaction in which a ketone or aldehyde is converted to an alkene through an intermediate hydrazone...

depending upon the reagent involved, whether a reactive intermediate involved in the reaction is a carbocation, a carbanion or a free radical, and whether...

an additional covalent intermediate to the reaction, and helps to reduce the energy of later transition states of the reaction. The covalent bond must...

A tetrahedral intermediate is a reaction intermediate in which the bond arrangement around an initially double-bonded carbon atom has been transformed...

effect of simplifying a single chemical entity (normal molecule, reaction intermediate, etc.) into two or more fragments. Chemical decomposition is usually...

known as the Criegee intermediate. In 1953, William von Eggers Doering and Edwin Dorfman elucidated the correct pathway for the reaction mechanism of the...

practice, a reaction is assumed to be elementary if no reaction intermediates have been detected or need to be postulated to describe the reaction on a molecular...

definition the reaction rate v for a chemical reaction occurring in a closed system at constant volume, without a build-up of reaction intermediates, is defined...

concentration of the intermediate is low, the reaction follows the producing pathway, leading then to a relatively high concentration of intermediate. When the concentration...

Bischler–Napieralski reaction. Mechanism I involves a dichlorophosphoryl imine-ester intermediate, while Mechanism II involves a nitrilium ion intermediate (both shown...

because studies showed that the reaction intermediate was a surface formate. For the y axis, the temperature at which the reaction reaches a specific rate was...

aromatic hydrocarbon is important in the petrochemical industry as a reaction intermediate in the production of styrene, the precursor to polystyrene, a common...

products, and sometimes intermediate products and reaction conditions. Chemical reactions happen at a characteristic reaction rate at a given temperature...

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...

itself to form diborane. Thus, it is an intermediate in the preparation of diborane according to the reaction: BX3 +BH4− → HBX3− + (BH3) (X=F, Cl, Br...

hyperconjugation. The major product of the addition reaction will be the one formed from the more stable intermediate. Therefore, the major product of the addition...

factors in reaction rate. Catalysts generally react with one or more reactants to form intermediates that subsequently give the final reaction product,...

formation of the oxyphosphonium intermediate 8 is slow and facilitated by the alkoxide. Therefore, the overall rate of reaction is controlled by carboxylate...

system. Reducible intermediates may appear in the reaction which can affect chemoselectivity. The amine substrate, imine intermediate or amine product...

(with separate workup of the Ugi intermediate) is one with the Buchwald–Hartwig reaction. In the Ugi–Heck reaction a Heck aryl-aryl coupling takes place...

cycle for respiration, concentrations of TCA intermediates remain constant; however, many biosynthetic reactions also use these molecules as a substrate....

also a precursor to 2,3-bisphosphoglycerate which in turn is a reaction intermediate in the glycolytic pathway. 1,3-Bisphosphoglycerate is the conjugate...