all lone-pair electrons and unpaired electrons. Hint: the radicals do not coexist in the same mechanistic step. CH2 Draw the two free-radical intermediates. One intermediate is an organic radical and the other is an inorganic radical. Select Draw C H Br Templates More Erase
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- CH,CH,СH, CI CH,СНHCICH, + 2HCI 2CH,CH,СH, + 2C1, The chlorination of propane proceeds as a radical chain reaction. Sort the 7 reaction steps (you may need to scroll down to see them all) into categories of: Initiation Propagation Termination сн, сH,CH,. CH3CH2CH2 CH,CH, CH, -di: сHсHCH- di: а — б: — 2б Cl CH3CH2CH2 CнснсH. СH,сH,CH, -н CH3CHCH3 н— н—й: сн,бнсн, CH,CнсH, CH CHCH сH,снсH,Which of the following is the rate-determining step in the free-radical bromination of methane? I || ||| IV Br₂ CH4 + Br CH3 + • CH3 + CH3 A) I B || C ||| Br₂ D) IV 2 Br. • CH3 + HBr CH3Br + CH3CH3 Br.What is the characteristic of a radical chain termination step? O radicals are formed substitution products are formed O a radical reacts with a molecule to give a new radical and a new molecule O two radicals combine to give a molecule
- What is the characteristic of a radical chain initiation step? O radicals are formed O substitution products are formed O a radical reacts with a molecule to give a new radical and a new molecule O two radicals combine to give a moleculeGive the reaction mechanism for the following subparts in clear handwritten!Q1A: step named A, B, C, D as one of either (Termination, Propagation, Initiation) Q1B: For radical reaction, match the intermediate 1,2,3,4 to the correct possible intermediate W,X,Y or Z
- mechanism's for this reaction C. Ph CH3 CH3 steps OH H3C 'N' Ph HThe free radical chlorination of isopentane yields isomeric monochlorinated isopentanes, namely: 1-chloro-2-methybutane; 2-chloro-2-methylbutane; 2-chloro-3-methylbutane; 1-chloro-3-methylbutane. Draw the mechanism and calculate the % yield of each product, assuming that at a specific temperature, the relative reactivities of 3º, 2º, 1° Hydrogen Atoms are in the ratio of 5:3: 1 in free radical chlorination reactions. HH C. CH³\C-C CH3 CH2 H Cl I CH3 HH CIH HCl HH 1 C. CH CH3 C-CH3 CH3 C CH3 CH2 + CH3 CH3 H CH3 H CH H Cl IV III CH3 CI IIWhat is the mechanism of the first step?
- 4. Why are most radical reactions considered "propagation" steps?5. For the chlorination of ethane, represented by the equation: CH3CH3 + Cl2 + hv→ CH3CH2CI + HCI, the following radical-mediated mechanism has been proposed: Cl2 2 Cl· + CI - CH4 + Cl. → CH3· + HCI CH3: + Cl2 → CH3CI + Cl· k1, k.1 k2 k3 CH3* + Cl· 2CH3CI ka, k.4 Additionally, it has been possible to establish, under certain experimental conditions, that the reaction is first order with respect to the methane, and three halves with respect to chlorine. a) Classify the different steps of this mechanism (i.e. initiation, propagation, etc.). b) Derive the rate law for the chlorination of ethane, based on the mechanism proposed. c) Identify which is the rate-determining step. Justify your selection. d) Indicate which are the assumptions and approximations you used so that this model could work (i.e. pre- equilibrium condition, steady state approximation, neglecting the contribution of a step, etc.).Which of the following is the rate determining step for this reaction: HBr Tui H-Br Br: A OA B C D O O O O Br: B C D