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Section B (d) Consider the reaction shown below, (Answer any Two questions from this section) H N-SO-o-Tol N Question 4 Name heat ON carbone + Step 1 Stop zabere E.O (a) Provide the names/or structures of two common radical initiators, [2 marks] tasylhydrazone Step 3 (b) Consider the 1.1-diphenyl-2-picrylhydrazyl (DPPH) radical shown below; ON N NO2 ON i. Define the term carbone. ii. Provide detailed mechanisms for steps 1 and 3. iii. Draw the structure for carbene E . E. [2 marks] [6 marks] [2 marks] 1.1-diphenyl-2-picrylhydrazyl radical (20 marks) Question 5 I. Is it highly reactive or persistent radical? Justify your answer. [1 mark] ii. Why it would not dimerise? [1 mark] (c) Predict the structures of radical/s A, radical anion's B and product C for the following reactions [6 marks] (a) Assign one of the following terms to show the relationship between each of the following pairs of compounds: enantiomers; conformers; identical molecules; constitutional isomers [4 marks] 0) H H Н H cal + Radical A HEC BI PH H heat 0) HC Br () ON 9 2 x Me Me 2 Na heat 1. dimerisation ii. add workup i) product C (CH4402) Radical anionis B ON (11) ci BCH (iv) M6H Me Merc Me 4 H