Pericyclic Reactions

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 photochemcial reaction between two olefins leading to a cyclobutane ring is : · JUNE 2011

ABC26OR0561 · The reaction between X and Y to give Z proceeds via X + Y Z · 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

ABC26OR0582 · In the two setp reaction sequence given below, the starting bis - sulfone acts as + heat · 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

ABC26OR1062 · The following transformation Is an example of · JUNE 2021

ABC26OR1017 · In the following concerted reaction, the product is formed by a Delta · DEC 2011

ABC26OR1021 · The two step conversion of 7-dehydrocholesterol to vitamin D3 proceeds through · JUNE 2012

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

ABC26OR0155 · Mechanism of the following transformation involves + · JUNE 2018

ABC26OR1061 · The following transformation involves a series of + + CO2 · DEC 2019

ABC26OR1042 · The frontier orbital interactions involved in the formation of the carbocation intermediate in the reaction of isobutylene with HCl are · JUNE 2016

ABC26OR0554 · The major product P of the given reaction is · 2000-2022

ABC26OR0555 · The major product P formed in the following photochemical reaction is · 2000-2022

ABC26OR1016 · The structures of the major products X and Y in the following transformation are + Delta X h nu Y · JUNE 2011

ABC26OR0142 · The major products A and B in the following reaction sequence are Delta (A) (B) · DEC 2011

ABC26OR0559 · Identify the major product P and Q in the following reactions from the list of compounds I to IV. I II III IV · 2000-2022

ABC26OR1025 · The major product formed in the following reaction is + 1. Delta 2. TiCl3, HCl · JUNE 2013

ABC26OR0145 · The major product formed in the following reaction is + Delta · JUNE 2013

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, [X] 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

ABC26OR0572 · In the following reaction, [X] the major product [X] is: · 2000-2022

ABC26OR1035 · The major product formed in the following reaction is Delta · JUNE 2014

ABC26OR1036 · The major product of the following reaction is · DEC 2014

ABC26OR0150 · The major product of the following reaction is · DEC 2014

ABC26OR1037 · The major product formed in the following reaction is heat · JUNE 2015

ABC26OR0151 · The major product formed in the following reaction is heat · JUNE 2015

ABC26OR1038 · The major product formed by photochemical reaction of (2E, 4Z, 6E)-decatriene is · DEC 2015

ABC26OR0579 · The major product X and Y formed in the following reaction sequence are cis - stilbene [C6H12]h nu [air]I2 Y · 2000-2022

ABC26OR0153 · The major products A and B formed in the following reaction sequence are + heat (A) h nu (B) · JUNE 2016

ABC26OR0586 · The major product formed in the following reaction is · 2000-2022 self-practice

ABC26OR0587 · In a 400 MHz 1H NMR spectrometer, a proton resonates at 1560 Hz higher than that of tetramethylsilane. The chemical shift value of this… · 2000-2022 self-practice

ABC26OR1052 · In the following transformation, the mode of electrocyclization A and the major product B are heat B · DEC 2017

ABC26OR1058 · The intermediate A and the major product B, formed in the following reaction are [A] Delta [B] · DEC 2019

ABC26OR1014 · The reaction given below is an example of Delta · JUNE 2011

ABC26OR1023 · The following transformation involves + H+ · DEC 2012

ABC26OR0146 · The following reaction proceeds through a Delta · DEC 2013

ABC26OR1028 · The following reaction proceeds through a Delta · DEC 2013

ABC26OR1034 · Pericyclic reaction involved in one of the steps of the following reaction sequence is (i) heat (ii) (EtO)3P · JUNE 2014

ABC26OR0574 · The pericyclic reaction given below is an example of · 2000-2022

ABC26OR1040 · The following transformation involves sequential · DEC 2015

ABC26OR1046 · The correct sequence of pericyclic reactions involved in the following transformation is · DEC 2016

ABC26OR1047 · Following reaction is an example of 2. t-BuOK · JUNE 2017

ABC26OR1049 · Following reaction involves · JUNE 2017