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Interactive 3D chemistry animations of reaction mechanisms and 3D models of chemical structures for students studying University courses and advanced school chemistry hosted by University of Liverpool
Due to the direct substitution of the carboxylic acid group onto the phenyl ring, alkyl-substitutedp-hydroxybenzoates are resistant to dimerization and subsequent yellowing.87–90 Secondary aromatic amines are very reactive antioxidants,91–94and as with the phenolic antioxidants, the primary radical ca...
The regioselectivity in the oxidative electron-transfer cycloreversion (CR) of 2,3-diaryloxetanes depends on the substitution of the aryl groups and on the... MA Izquierdo,MA Miranda - 《European Journal of Organic Chemistry》 被引量: 27发表: 2004年 ...
Arene Chemistry (Reaction Mechanisms and Methods for Aromatic Compounds) || Radical-Nucleophilic Aromatic Substitutionabsolute asymmetric nucleophilic aromatic substitutionchiral catalyzed asymmetric nucleophilic aromatic substitutionJohn Wiley & Sons, LtdArene Chemistry...
It is pleasing to find that an N-methyl group is also well tolerated on the aniline substrate 6, with the target benzofuran product 7h afforded in a higher isolated yield. Moreover, the secondary amine substrates 6 bearing various substituents and substitution patterns on the N-phenyl groups ...
Understanding reactivity and selectivity patterns in radical chemistry is crucial to harness and develop the full potential of open-shell species in synthetic settings. Polar effects operate at the transition-state level of all radical reactions and have important implications in controlling their outcomes...
M Chitroub,S Scherrer,H Scherrer - 《Journal of the Physics & Chemistry of Solids》 被引量: 40发表: 2000年 Rate Coefficients for Intramolecular Homolytic Substitution of Oxyacyl Radicals at Sulfur It is predicted on the basis of ab initio and density functional calculations that intramolecular ho...
Given the inherent propensity for C–H site-selectivity in intermolecular C–C couplings, we envisioned that the intramolecular aryl migration from a heteroatom to a carbon center via radicalipsosubstitution—a process termed radical Truce-Smiles rearrangement—would be a promising strategy to enable a...
transfer through a four-membered ring transition state 25-ts. The activation free energy was determined to be 22.7 kcal/mol, which is very close to the metal-free radical substitution transition state 8-ts (22.1 kcal/mol). With the reliable mechanism in hand, we wanted to understand...