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- 4.1) Propose a mechanism for the following polymerisation reaction: CH3 CH3 AICI3/H₂O H₂C- -CH₂ H₂C= C TI CH3 CH3Jn CH3 CH3 + CI-AI-OH5. Consider the synthesis of 2-butanone from butyne: Hg2+ || CH3CH,-C=C–H CH;CH,-Ĉ-CH3 H3o* (iv) Name the class of compound D belongs to. (v) Comment on the stability of compound D compared to 3-butanone.(9) LOSiMe3 Me NO₂, SnCl4 then H₂O or Me FO, Cu(acac)2 then H₂O C9H1402 NaOEt EtOH
- In the light-catalyzed alkane chlorination mechanism, the first stage (first step) consists of the cleavage t DY -C-H »r ܘܘ: ܘܘ: ܀ X- + :Q -:+ *@ ܘ: ܘ: :ܘ: ܘ:4G 4G illl 1:54 PM 43 ... 2. Name the following compounds: (c) CH3 CH3CHNH2 (a) (b) CH3CH2NHCH,CH3 N-CH3 (d) CH2CH3 (e) H CH3 H2NCH2CH2CHNH25. Consider the synthesis of 2-butanone from butyne: Hg2+ CH3CH,-C=C–H CH3CH, Ĉ -CH3 H3o* (i) Draw the structure of the compound D. (ii) Compound D isomerizes to form 2-butanone. What is this isomeric process called? (iii) Use the mechanism to show the conversion of compound D to 2-butanone.
- (d) When butane, CH3CH2CH2CH3 and bromine gas, Br2 is exposed to sunlight, monobrominated product are produced. The reaction equation is given below: uv CH;CH,CH,CH3 + Br2 A + B (i) State the type of reaction. (ii) What is the function of the sunlight in the reaction? (iii) Draw the structure of monosubstituted products, A and B. Label the major product. (iv) Draw the propagation steps in the mechanism for the formation of the major product.PLEASE TURN TO THE NEXT PAGE 4. (a) Draw the structures of the molecules formed when monomer D undergoes the following reactions in the order shown below: (i) Reaction with tert-BuLi (ii) Reaction with 100 (one hundred) units of monomer D (iii) Reaction with CO2 followed by H* (iv) Reaction with n-octanol in the presence of H* OCH3 OCH3 monomer D Mechanisms are not required. (b) What types of polymerization mechanisms may one expect monomer D to undergo? Explain. (c) Would tert-butanol be an appropriate solvent for the ionic polymerization of monomer D? Explain. (d) Why is tert-BuLi an excellent initiator for anionic addition polymerizations, but tert-BuNa is a poor one?a H2O H2SO4 2 Br2 (4) (5)