Section A
Q1. (a) Which one of the following is aromatic? Justify your answer. Give names of the given annulenes : (b) What is secondary kinetic isotope effect? Explain it using the reaction of HCN with the following molecules : (c) Comment on aromatic/non-aromatic/anti-aromatic behaviour of the following compounds and justify your answer : (d) Predict the products [A], B and C. Also give the reaction mechanism of the following reaction sequence : (e) Giving mechanism, write down the product(s) in the following chemical transformation :
(a) Which one of the following is aromatic? Justify your answer. Give names of the given annulenes :
(b) What is secondary kinetic isotope effect? Explain it using the reaction of HCN with the following molecules :
(c) Comment on aromatic/non-aromatic/anti-aromatic behaviour of the following compounds and justify your answer :
(d) Predict the products [A], B and C. Also give the reaction mechanism of the following reaction sequence :
(e) Giving mechanism, write down the product(s) in the following chemical transformation :