The effect, which is most pronounced in the 6,6-diphenyl derivative ( 10), is explained in terms of the spatial structures of the compounds and their substantial deviations from planarity.doi:10.1016/0040-4020(77)80133-6Israel AgranatMichafl Hayek...
this can be explained by certain phase relationships established between the external force and the forced oscillations, such that the power entering the system from the exciting source in one coordinate is equal to the power delivered by the system to the source in another coordinate. An example...
(organic chemistry) Any of two or more possible structures of the same compound that have identical geometry but different arrangements of their paired electrons; none of the structures has physical reality or adequately accounts for the properties of the compound, which exists as an intermediate ...
This phenomenon, called the inverse Josephson effect, was explained in Chapter 13, Section VII.E. If the magnetic field is scanned through zero to negative fields, the absorption exhibits a hysteresis, as shown in Fig. 14.65. The absorption is called nonresonant because it does not involve ...
The significantly higher rotational barriers of 1 and 3 than that of 2 is explained by the charge distribution associated with the conjugation in the planar allyl ions. The statement made by Wiberg (J. Am. Chem. Sec. 1990, 112, 61) that the allyl anion has little resonance stabilization ...
Stronger acidity of 3 compared to 4 (both in the gas phase and in solution) cannot be explained by SIR and must be attributed to a stabilizing interaction in the anion 3A; approximately it might be modelled as a pole/induced dipole interaction. The explanation by SIR must be used with ...
Does CH2N2 have resonance? Diazomethane, CH2N2, is a yellow, poisonous, potentially explosive compound, which is a gas at room temperature. The structure of diazomethane is explained usingthree resonance forms. In organic chemistry laboratory, diazomethane has two common uses. ...
Despite the irreversible character (explained by radical dimerization25,26,27), it is clear that the electron-withdrawing aldehyde functionality has decreased the donor strength of the DTF unit noticeably (>100 mV), signalling an important contribution of the quinoid resonance form to the overall ...
Understanding solvent effects on structure and reactivity of organic intermediates: a Raman study The effect of solvent on chemical reactivity has generally been explained on the basis of the dielectric constant and viscosity. However a number of spectr... G Balakrishnan,SK Sahoo,BK Chowdhury,... ...
The pH-rate profile is explained on the basis of two competing reactions, both involving the enolate ion of 1 and proceeding by way of 2,4-dimethyl-1,3-cyclobutanedione. Activation parameters, Ea of 13.6 and 13.2 kcal/mol and In A of 28.9 and 24.7 sec-1, were calculated at pH 1.6 ...