andersen237_final_packet_B_key - CHEM238 Final Exam Study...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
CHEM 237B Test # 3 , TA (24) I. True (T) /False (F). The scoring on this section will be + 4 for each correct answer, - 1.5 for each wrong answer. + s-lire, auk& + '. . An increasing proportion of SN1/E1 versus SN2 products at higher temperatures 'V*reflects the fact that the energy required for heterolytic bond cleavage decreases as the temperature is raised. . The relative stabilities of carbocation intermediates account for the addition reaction outcomes that correspond to the application of Markovnikov's rule. 7 . Alkyl shifts that lead to rearranged carbon skeletons in elimination products cannot occur when the E2 mechanism applies. . CH~CEC is 1019 times more acidic than CH3CH=CHz , that makes the alkyne a moderately strong acid like CH3CHzOH. - shl\ mlrti wr 'be F- 2 . Secondary alkyl bromides do not undergo SN reactions. (13) . Given the following relative acidities in CH30H - H2Se > H2S > H20, rank the relative nucleophilicities of the following species in DMSO: ,; rpmhz r.l-, , -nu~pr;~.Q - - +lPu ~~CI?+-J b) H20, H2S, and HO- - ffb- 7 H,o 7 HLS a) HO-, HS-, HSe- and NH3 z Nff3 z HS- > Hlr- (10) III. Cis-4-t-butylcyclohexyl bromide reacts with tBuOK/tBuOH about 500 times faster than the trans isomer. Propose the mechanism and explainwhy the cis isomer isomer reacts faster.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/15/2009 for the course CHEMISTRY 237 taught by Professor Anderson during the Spring '09 term at University of Washington.

Page1 / 8

andersen237_final_packet_B_key - CHEM238 Final Exam Study...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online