The rate coefficient is expressed by the following Arrhenius equations: For ethyl N-benzyl-N-cyclopropylcarbamate For ethyl diphenylcarbamate The presence of phenyl and bulky groups at the nitrogen atom of the ethylcarbamate showed a decrease in the rate of elimination. Steric factor may be ...
The relevance of interaction kinetics in determining biological response to estrogens. The study of the kinetics of the interaction between two ethynyl estradiol derivatives (11尾-methoxy-17-ethynyl-1,3,5(10)-estratriene-3,17尾-diol and 11伪-... BOUTON M. M.,RAYNAUD J. -P. - 《...
Steric factor Steric crowding Steric strain (or steric tension) Steric interactions, whether between electrons or atoms, always result in a rise in the energy of a system. Systems with higher energies are more unstable than systems with lower energies. Figure 1 depicts cyclohexane conformations as ...
(67). This work involved the rationalization of bond angle data as an alternative to VSEPR theory. In a molecule of the form X2A,ab initiomolecular orbitalcalculations showed that the RAXbond distance was the major factor influencing the X–A–X angle, particularly if A is a first-row ...
Otherwise, an increase of alkyl–hydrogen interaction caused steric acceleration to be the determining factor.doi:10.1002/kin.550160108Carolina ArcilaMaria PinoJacek LubinkowskiJose Adan Hernandez AGabriel ChuchaniJohn Wiley & Sons, Inc.International Journal of Chemical Kinetics...
The numerical findings of the n(CPF)factor provide adequate proof of the arrangement behavior of the adsorbed CPF ions occupying the exterior surfaces of CA, AC, PANI/CA, and PANI/AC. This includes both the vertical as well as the horizontal orientations. Additionally, these outcomes are signi...
possible combinations of steric-gate residues. When the interactions with all six gate residues are perturbed, the free-energy barrier is increased by 2.5–2.7kBT(Fig.5d), which corresponds to a decrease in the rate by a factor of 12–15. However, similar increases in the barrier are also...
Two dimensionless kinetic factors (i. e., reduced addition-reaction rate constant and reduced rotational diffusion constant), supercooling, and steric tolerance anlge range, control process kinetics and distribution of single elements in the cluster's surroundings. Rate reduction factor responsible for ...
The earlier reported cone of non-reaction has now increased. A more correct overall steric factor has been extracted from the data: P = 0.38 γ 0.02.doi:10.1016/0301-0104(82)85042-8S. StolteK.K. ChakravortyR.B. BernsteinD.H. Parker...
The steric interaction energy has been included in the theoretical calculation of the aggregation rate constant by means of Fuchs' stability factor. Good agreement between simulation, experimental, and theoretical calculations was obtained. 漏 2000 American Institute of Physics.Romero-Cano...