4. Which of the following statements concerning the initiation stage of a radica

Question

4. Which of the following statements concerning the initiation stage of a radical chain mechanism is true? a. At least one bgmolvtic cleavage event must occur. b. The total number of electrons in each elementary step within initiation must be odd. c. The radical initiator is associated with a very large bond dissociation enthalpy. d. The propagating or chain-carrying radical is consumed during initiation. e. All initiator must be consumed in this stage before propagation can begin. Homework 07 CHEM 2311 Spring 2018 5. Which of the following radicals is most stable? Me CH3 b c. Me a. CH2 d. Me

Explanation / Answer

4.

For the Chain initiation step atleast one homolytic cleavage must occurr.

(a)

5.

(e) is more stable free radical.

Because is having more number of hydrogen atoms ( 3 + 2 + 2 = 7 ) on the adjacent carbons which are useful to stabilise the carbon free radical through hyper conjugation.

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