Question

Which of the following reactions will undergo an E1 reaction faster? Question 2 Not yet answered Points out of 1.0 P Flag question (a) C (b) (c) (d) Select one: O a. (a) 1-bromopentane O b. (b) E-1-bromo-1-pentene c. (C) 3-methyl-3-bromopentane O d. (d) 3-methyl-3-bromo-1-pentene O e. The two fastest of these will have exactly the same rate constant. True or false: When both an SN2 and an E2 reaction are possible, increasing the temperature of the reaction will speed up the E2 reaction and slow down the SN2 reaction. Question 3 Not yet answered Points out of 1.0 Select one: O a. True. P Flag question O b. False; heating the reaction speeds up the SN2 reaction and slows the E2 reaction. c. False; all reactions go faster at higher temperatures, but how much faster (i.e. their temperature dependence) varies. d. The reaction rates will not change upon heating. O e. True except the parts of the statement that are false. (Note: While this may or may not be technically correct, it is an awful way to answer a true/false question, so it is worth negative points out of spite.)

Answer 1

If we look at the mechanism 07 El real trasy 1 10 bone BUS So in the first step the sto substrate undergo rapid elimination of living roup then a carbo lation formed. More the stability of the carbocation more will be toster the reaction. for a Br. 1 primary earbocation fresy ten stable) Br - a byd a here leasing of Bris difficult from an 562 Carbon stom. Bola W le stable 20 carbo Qatiom Brod @ I Monet als bed stable 3 carsho- cation along with stabilisation due to conjugation home this in the most stable Carbocation the re will undergo tester El Correct option to tastest El

Temperature has an important rok to play in deciding weather or reaction is an elimination ar substitution. In an elimination toro molecouters become three R-Clamento Bot K OtBu L R-eh-ett + the Olt and 4 kBr Ina substitution reaction, tromoleculen form from the moleculen, R^ Brody Ra Nuit These two reaction therefore differ in the change in entropy during the reaction: Ds is greater for elimination than to substitution. Dh=A!? - TAS for spontanity DG40 So, it as is positive more, then the reaction will forows at high temperature so that all become negetive. se, Elimination should forowred at high temperature. 3o, increasing temperaturne will speed up E2 reaction. And when temperature increases, the SN2 will be less favorned or, 3N2 Slows down, de E2 occure. who arotti So, the given statement is Torre correct option