ASSIGNMENT 1 Write the Mechanism (Use arrows) for Initiation step, Propagation steps and all possible Termination steps. Label each step accordingly. CH3 CH3 Br + BrBr H3C + HBO CH3 CH₃
Consider the following reaction mechanism: 1) Initiation Br2 → 2 Br• 2) Propagation (here a cycle of two steps) Br• + H2 → HBr + H• H• + Br2 → HBr + Br• 3) Termination 2 Br• → Br2 This reaction is catalyzed by platinum. Wat causes the bromine to split in the initiation step? Does the platinum influences this or is it just due the weak bonding between Br-Br?
3. Which of the following is the most reacti ve substrate in an El reaction? Br Br Br Br Mole II II IV A) I B II II D) IV
Question 1: Which of the following is a substitution reaction? OH Br A. I D. IV Question 2: Which of the following is an elimination reaction? он Cl Br SH Cl IV A. I B. C, 111 D. IV
Identify the main product of the following transformation. Br Br A) 1) PPhy 2) NaNH2 3) benzaldehyde 4) HBO B) c) D) Br Br
10 pts Question9 Which reaction product is formed at 100°C? Br DMF Br Br IV O IV
Consider the following reaction mechanism: 1) Initiation Br2 → 2 Br• 2) Propagation (here a cycle of two steps) Br• + H2 → HBr + H• H• + Br2 → HBr + Br• 3) Termination 2 Br• → Br2 This reaction is catalyzed by platinum. My question is what does the platinum do? I know that platinum is able to split the H2 bond but is that the only function of the platinum in this reaction?
Which of the following mechanistic steps of allylic bromination does the following represent? Br H Initiation Termination via disproportionation Termination via recombination Propagation Hydro-carbo dissociation Carbo-bromo reordination What is the product of the following Diels-Alder reaction? Diels-Alder ? 1 - 0 0 A B D E Ос ОЕ OD A
1. What is the major product of the following reaction? Benzofuran 1 I. IV. Br Br ?. Br V. ?. A)I B)? ??? D)IV ?v
Instructions: draw in the mechanism for each reaction Initiation Propagation Termination HBr H202 Br