Propose a mechanism for the following polymerisation reaction: H₂C= CH3 1) KNH2 2) MeOH H₂N- CH3 H -H₂C- -H

Only C

(a) (b) HO N N-H Catalytic H+ (-H₂O) ? (c) NH2 HO N (d)

Following is a balanced equation for bromination of toluene.(a) Using the values for bond dissociation enthalpies given in Appendix 3,calculate ∆H0for this reaction.(b) Propose a pair of chain propagation steps and show that they add up to theobserved reaction.(c) Calculate ∆H0for each chain propagation step.(d) Which propagation step is rate-determinin

CH3 CH3CH₂CH=CCH2CH3 2- Give the common names for the following Alkenes: Ethene, Propene, 2-Methyl propene, and 2-Methyl, 1,3- butadiene. 3- Draw the correct structures of the following: 1-1,2-Dimethylcyclohexene 2-4,4-Dimethylcycloheptene 4- Write the complete mechanism of electrophilic addition of HI to 2-Methyl propene. Show the directions of the electron flow with the proper arrow orientation. Name the final product. 3- Cis-2-Butene and Trans-2-Hexene 4- cis-9-tricosene 5- Trans-9-tricosene 5- What is the sole product of the reaction of HC1 with 2-Methyl propene? Show the reaction with the reactant on the left side and the product on the right side and the intermediate between them. 1 Dashboard 900 Calendar To Do D Notifications Inbox

The rate of hydration of 2-butene and 2-methylpropene differ by several orders of magnitude. Whcih alkene is more rapidly hydrated and why?

Some of the most useful compounds for organic synthesisare Grignard reagents (general formula R-MgX, where X is ahalogen), which are made by combining an alkyl halide, R-X,with Mg. They are used to change the carbon skeleton of a start-ing carbonyl compound in a reaction similar to that with R-Li:.(a) What is the product, after a final step with water, of thereaction between ethanal and the Grignard reagent of bromo-benzene? (b) What is the product, after a final step with water, ofthe reaction between 2-butanone and the Grignard reagent of2-bromopropane? (c) There are often two (or more) combina-tions of Grignard reagent and carbonyl compound that will givethe same product. Choose another pair of reactants to give theproduct in (a). (d) What carbonyl compound must react with aGrignard reagent to yield a product with the -OH group at theendof the carbon chain? (e) What Grignard reagent and carbonylcompound would you use to prepare 2-methyl-2-butanol?

For each pair of ions, determine which ion is more stable. Use resonance forms to explain your answers. (a) CH;-CH-CH, or CH,-CH-OCH, (b) CH;-N-CH, CH3-CH-CH; or CH;-C-CH; CH;-C-CH, (c) CH=CH-ČH-CH, or CH,=CH-CH;-CH2 (d) CH-CH, or CH,-C N: (e) CH2 CH2 () or or

For each alkane, which mono brominated derivatives could you form in good yield by free-radical bromination?(a) cyclopentane                                                   (b) methylcyclopentane(c) 2-methylpentane                                             (d) 2,2,3,3-tetramethylbutane

4-47 Questions e) and questions f) only