88
Question
Which of the following statements is/are wrong about pericyclic reaction ?
Which of the following statements is/are wrong about pericyclic reaction ?
Open in App
Solution
The correct options are
B It is intermolecular cyclisation of acyclic compound.
D It Proceeds via free-radical mechanism.
- Pericyclic is the name for the family of concerted reactions involving no charged intermediates with a single cyclic transition state. The word 'pericyclic' comes from how the electrons flow round the outside of the ring. Cycloadditions, sigmatropic rearrangements and electrocyclicreactions are the three main types.
- An important body of chemical reactions, differing from ionic or free radical reactions in a number of respects, has been recognized and extensively studied. Among the characteristics shared by these reactions, three in particular set them apart.:
1. They are relatively unaffected by solvent changes, the presence of radical initiators or scavenging reagents, or (with some exceptions) by electrophilic or nucleophilic catalysts.
2. They proceed by a simultaneous (concerted) series of bond breaking and bond making events in a single kinetic step, often with high stereospecificity.
3. In agreement with 1 & 2, no ionic, free radical or other discernible intermediates lie on the reaction path.
- Hence option B is correct.
B It is intermolecular cyclisation of acyclic compound.
D It Proceeds via free-radical mechanism.
- Pericyclic is the name for the family of concerted reactions involving no charged intermediates with a single cyclic transition state. The word 'pericyclic' comes from how the electrons flow round the outside of the ring. Cycloadditions, sigmatropic rearrangements and electrocyclicreactions are the three main types.
- An important body of chemical reactions, differing from ionic or free radical reactions in a number of respects, has been recognized and extensively studied. Among the characteristics shared by these reactions, three in particular set them apart.:
1. They are relatively unaffected by solvent changes, the presence of radical initiators or scavenging reagents, or (with some exceptions) by electrophilic or nucleophilic catalysts.
2. They proceed by a simultaneous (concerted) series of bond breaking and bond making events in a single kinetic step, often with high stereospecificity.
3. In agreement with 1 & 2, no ionic, free radical or other discernible intermediates lie on the reaction path. - Hence option B is correct.
Suggest Corrections
0
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
