The Knoevenagel Condensation Reaction
(KCR) is one of the most well known reactions in organic chemistry which was introduced by Emil Knoevenagel .
In our previous studies, we synthesized cross-linked poly(orthocarbonate)s using tetraethyl orthocarbonate (TEOC) and different multihydroxyl monomers (aromatic, aliphatic, cyclic, and linear) by condensation reactions
at relatively high temperatures.
As a result, though no additional condensation has occurred, such a futile process can cool the condensing structure, thereby facilitating its growth when other true condensation reactions
[8-12] are occurring in parallel.
The unliquefied residues in the phenol liquefaction reactions could give useful information on the condensation reactions
between cellulose and polyphenol components.
Unfortunately, the condensation reaction
between NE and MDA is quite facile.
An underlying cause is associated with line emission, dissipation of the energy liberated during condensation reactions
In the case of Cloisite 30B with--OH end groups, as seen by FTIR, condensation reactions
did not occur with the--OH groups of formaldehyde solution.
Salon, MCB, Bayle, PA, Abdelmouleh, M, Boufi, S, Belacem, MN, "Kinetics of Hydrolysis and Self Condensation Reactions
of Silanes by NMR Spectroscopy.
Generally most condensation reactions
occur with elimination of water or small molecules and rate of reaction is limited by system's ability to remove these small molecules due to various process and system limitations.
The novel, low-cost membranes separation technology is also relevant for condensation reactions
in general (equilibrium limited reactions).
To extend these concepts to the solar chromosphere, it is useful to consider the types of condensation reactions
which might be present in this region of the Sun.
Figure 2d shows a possible structure derived from the different condensation reactions
involved in the sol-gel process.
By necessity, these exothermic condensation reactions
involve the ejection of an excited atomic species from the condensate which can then relax back to a lower energy level through the emission of a photon.
Accordingly, the end of hydrolysis coincides with a decrease of the OH band due to condensation reactions
, whereas this latter grew up during the first stage of the irradiation (t < 65 s).
These compounds are first chemically reacted with titanium isopropoxide (TIP), then are slowly released through subsequent hydrolysis and condensation reactions