Pericyclic Reactions · Organic Chemistry

110 questions in this chapter.

Cycloaddition Diels Alder

ABC26OR0553 · Order of reactivity of the following dienes X, Y and Z in Diels -Alder reaction is (X) (Y) (Z) · 2000-2022
ABC26OR0140 · The concerted photochemical reaction between two olefins leading to a cyclobutane ring is: · JUNE 2011
ABC26OR1015 · The concerted photochemical reaction between two olefins leading to a cyclobutane ring is: · JUNE 2011
ABC26OR0561 · The reaction between X and Y to give Z proceeds via · 2000-2022
ABC26OR0571 · The diene which undergoes Diels-Alder reaction with maleic anhydride is: · 2000-2022
ABC26OR1033 · In a Diels-Alder reaction, the most reactive diene amongst the following is · JUNE 2014
ABC26OR0575 · Match the compound in the Column-I with photochemical reactions that they can undergo given in the Column-II: Column-I Column-II (i) (p)… · 2000-2022
ABC26OR0582 · In the two setp reaction sequence given below, the starting bis - sulfone acts as · 2000-2022
ABC26OR1048 · Following reaction is an example of · JUNE 2017
ABC26OR1056 · For the following thermal [2+2] cycloaddition reaction, the correct statement about Transition State (TS) and preference for endo product… · JUNE 2018
ABC26OR0156 · For the following thermal [2+2] cycloaddition reaction, the correct statement about Transition State (TS) and preference for endo product… · JUNE 2018
ABC26OR1062 · The following transformation Is an example of · JUNE 2021

Electrocyclic

ABC26OR1017 · In the following concerted reaction, the product is formed by a Delta · DEC 2011
ABC26OR0557 · Select the correct classification in the following reaction from option I to IV gives below. (I) Conrotatory electrocyclic reaction (II)… · 2000-2022
ABC26OR1021 · The two step conversion of 7-dehydrocholesterol to vitamin D3 proceeds through · JUNE 2012
ABC26OR0563 · The products Y and Z are formed, respectively, from X via · 2000-2022
ABC26OR1031 · The number of pi electrons participating and the pericyclic mode in the following reaction are · DEC 2013
ABC26OR1043 · The following transformation proceeds through two consecutive electrocyclic processes, which are · JUNE 2016
ABC26OR1055 · Mechanism of the following transformation involves · JUNE 2018
ABC26OR0155 · Mechanism of the following transformation involves + · JUNE 2018
ABC26OR1061 · The following transformation involves a series of + + · DEC 2019

Frontier Orbital Analysis

ABC26OR1042 · The frontier orbital interactions involved in the formation of the carbocation intermediate in the reaction of isobutylene with HCl are · JUNE 2016
ABC26OR1050 · (being typed) · DEC 2017
ABC26OR1060 · The HOMO of pi -molecular orbitals of methylazide is · DEC 2019
ABC26OR0160 · The HOMO of pi -molecular orbitals of methylazide is · DEC 2019

Pericyclic Reactions – General

ABC26OR0554 · The major product P of the given reaction is · 2000-2022
ABC26OR0141 · The structures of the major products X and Y in the following transformation are + Delta X Y · JUNE 2011
ABC26OR0555 · The major product P formed in the following photochemical reactionis · 2000-2022
ABC26OR1016 · The structures of the major products X and Y in the following transformation are + Delta X Y · JUNE 2011
ABC26OR0556 · The most appropriate starting materials for one step synthesis of the cmpound (I) are · 2000-2022
ABC26OR0142 · The major products A and B in the following reaction sequence are Delta · DEC 2011
ABC26OR1018 · The major products A and B in the following reaction sequence are Delta · DEC 2011
ABC26OR0558 · Identify the major product P in the following reaction. · 2000-2022
ABC26OR0559 · Identify the major product P and Q in the following reactions from the list of compounds I to IV. · 2000-2022
ABC26OR1020 · The major product formed in the following concerted reaction is · JUNE 2012
ABC26OR0560 · Identify the major product P in the following reaction · 2000-2022
ABC26OR0143 · In the following sequence of pericyclic reactions X and Y are · DEC 2012
ABC26OR1022 · In the following sequence of pericyclic reactions X and Y are · DEC 2012
ABC26OR0562 · The major products P1 and P2, respectively, in the following reaction sequence are + · 2000-2022
ABC26OR0144 · The major product formed in the following reaction is + · JUNE 2013
ABC26OR0564 · Photoirradiation leads to the following set of products: · 2000-2022
ABC26OR1025 · The major product formed in the following reaction is + 1. 2. TiCl3, HCl · JUNE 2013
ABC26OR0145 · The major product formed in the following reaction is + Delta · JUNE 2013
ABC26OR0565 · In the reaction sequence: + · 2000-2022
ABC26OR1026 · The major product formed in the following reaction is + Delta · JUNE 2013
ABC26OR0566 · In the reaction sequence + The major products X and Y, respectively are · 2000-2022
ABC26OR0567 · In the reaction, · 2000-2022
ABC26OR0147 · The number of nodes present in the highest occupied molecular orbital of 1, 3, 5-hexatriene in its ground state is · DEC 2013
ABC26OR0568 · In the reaction, the major product [X] is: · 2000-2022
ABC26OR1029 · The number of nodes present in the highest occupied molecular orbital of 1, 3, 5-hexatriene in its ground state is · DEC 2013