For the average first semester student, these distinctions come up the most in substitution reactions, where hydrogen bonding solvents tend to decrease the reactivity of nucleophiles; polar aprotic solvents, on the other hand, do not. There are 3 types of solvents commonly encountered: nonpolar, po...
2014. The preferred radical scavenging mechanisms of fisetin and baicalein towards oxygen-centred radicals in polar protic and polar aprotic solvents. RSC Adv. 4(61):32228-36J. M. Dimitric Markovic,D. Milenkovic,D. Amic,M. Mojovic,I.Pasti,Z. S. Markovic.The preferred radical scavenging ...
"The solvent affects the rate of reaction because solvents may or may not surround a nucleophile, thus hindering or not hindering its approach to the carbon atom. Polar aprotic solvents, like tetrahydrofuran, are better solvents for this reaction than polar protic solvents because polar protic ...
Such interpolymer complex formations were examined in several protic and aprotic solvents. The obvious relationship between the complex formation and the dielectric constant of the solvent was eludicated. The effect of hydrophobic interactions ... H Ohno,K Abe,E Tsuchida - 《Die Makromolekulare Chem...
The polar aprotic solvents are those that do not contain $ \text{N-H} $ bonds and $ \...
The solubilities of KF in seven polar solvents had been determined in the temperature range from 300.87 to 360.85 K by a dynamic method. The experimental data were correlated with the λh equation. The obtained data are useful for the preparation of 2,3,4,5-tetrafluorobenzoic acid technology....
have been prepared and shown to act as crystallinehosts for the inclusion of organic solvents involving protic polar, aprotic dipolar and apolar molecules. ... EDWIN,WEBER,KONSTANTINOS,... - 《Journal of Inclusion Phenomena & Macrocyclic Chemistry》 被引量: 15发表: 1997年 Synthesis and Photophysic...
Their main respective advantages are discussed with regard to the solvent and polymer chemical structures and the type of interactions involved in the sorption phenomenon.UNIQUAC-FV is shown to provide the best results for the sorption of aprotic species (ether, ester) in polyurethaneimides, as ...
On the other hand, we found that the amplitude of components that decay in a few picoseconds and/or the constant offset of the TCF in protic solvents is relatively large compared with that in aprotic solvents. With the formation and dissociation of hydrogen bonds between ion solute and solvent...
At a solvent-to-water ratio of 4/1 (v/v) the aprotic solvent acetonitrile gave significantly lower quantities of NVRs compared to the protic solvents methanol and ethanol. Decrease of the solvent-to-water ratio from 4/1 to 1/1 (v/v) led in case of ethanol and acetonitrile to massively...