ring closure उदाहरण वाक्य

This approach also has the advantage that the thermal ( disrotatory ) ring closure can not take place because of steric hindrance between the substitution groups.
Conversely in a polyene of 4n + 2 ?-electrons, an electrocyclic ring closure is disrotatory under thermal conditions and conrotatory under photochemical conditions.
As part of the Erding Ring Closure ( " Erdinger Ringschluss " ) project, the airport will also be linked to eastern Bavaria.
Considering the electrocyclic ring closure of the substituted 1, 3-butadiene, the reaction can proceed through either a conrotatory or a disrotatory reaction mechanism.
The peptide has several unusual features, including four ring closure reaction is catalyzed by two C-terminal thioesterase domains of Txo2, forming a lactone.

If a generalized electrocyclic ring closure occurs in a polyene of 4n ?-electrons, then it is conrotatory under thermal conditions and disrotatory under photochemical conditions.
Intramolecular attack of the electrophilic carbonyl carbon by the nitrogen, resulting in a 5-membered ring closure of the positively charged "'6 " '.
For ring closing reactions, it is an example of enantioselectivity, wherein a single enantiomer of a cyclization product is formed from the selective ring closure of the starting material.
The diradical mechanism has been supported by Homolysis of the weakest bond in azulene occurs, followed by a hydrogen shift and ring closure so as to retain the aromaticity of the molecule.
The "'Erding ring closure "'( ) is a project to build a long, double-track railway that is planned to run from Munich Airport to Erding.