reactive intermediate

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reactive intermediate

[rē′ak·tiv ‚in·tər′mē·dē·ət]
(chemistry)
An unstable compound formed as an intermediate during a chemical reaction.
References in periodicals archive ?
To determine catalytic intermediate structures of ToCDS with substrate, product, or reaction intermediate ligands, we soaked and cocrystallized substrate lcysteine with native ToCDS crystals and determined three different complex structures of ToCDS (see Figure S1 in Supplementary Material available online at https://doi .org/10.1155/2017/5395293).
As a result, we observed no increase in the rate of 2',3'-cGMP, as a reaction intermediate catalyzed by cyclizing RNases (Figure 3(b)).
* Protonation at a hydroxyl then loss of water: stabilization of the reaction intermediate;
For the first time, Klinowski and Anderson detected carbon monoxide as an important reaction intermediate. They also found some compounds that got stuck in the zeolite passages, including several isomers of tetramethylbenzenes -- chemicals as bulky as their name.
There are, however, remarkably few experimental methods for studying ion-molecule reaction intermediates in the absence of solvent or environmental effects - especially when these intermediates are cationic.
An ideal solvent system would be one that can dissolve urea and all four reaction intermediates well, at least at near reaction temperatures, but it was not the case in synthesis reactions of D from DA; some reaction intermediates are not adequately soluble in all the solvent systems studied, except the water system where the solubility of final product is so high that it results in low yields due to further transformation into waste products:
As far as the toxicity is concerned, it is believed that the reaction intermediates may exhibit higher toxicity than the parent compounds during the degradation process.
Models of the reagents, products, and reaction intermediates were also constructed in order to estimate the overall reaction energy profiles.
However, the following proposes time-resolved crystallographic experiments where chemical expertise is kept at a minimum, the extent of reaction initiation is large, the crystal quality can be moderate, radiation damage is zero, and time resolution is good enough to capture the reaction intermediates. This experiment has the potential to transform enzymology because it produces entire time series (movies) from reactions in enzymes rapidly.
[21] reported the kinetics of the tetralin hydrogenation in decane over Ni/[Al.sub.2][O.sub.3] catalyst in the temperature range of 85-160[degrees]C and a pressure range of 20-40 bar; the hydrogenation proceed by sequential steps from tetralin to cis- and trans-decalins with the formation of octalins as reaction intermediates. Besides the hydrogenation products, Gault et al.
Cyclic anhydride and protonated amide functional groups were identified as reaction intermediates, which resulted in carboxylic ester linkages between MSO and cellulose upon elevated temperature curing.
The enzyme complex has a fascinating internal tunnel for the transfer of reactive reaction intermediates. The studies also discovered an unexpected organisation of enzyme complexes into fibres.