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- Consider the following equilibrium: O || R-C-H + HCN HO OH R-C-H | CN (A) When R = CH3CH2-, Keq = 1. (i) Predict whether Keq should be greater or less than 1 when R = CICH2, and (ii) when R is CH2=CH. Explain. (B) In the case where R is CH2=CH, the cyanohydrin is formed faster but given enough time, another constitutional isomeric C4H5NO product predominates. Explain and write a base-catalyzed mechanism for the formation of the other isomer. Recall that: HO HON N4. [a] What can one conclude regarding the nature of the transition state structure for the following cases [i] AS *> "tighter" or "looser" in the transition structure than at the start? > 0, and [ii] AS +<0? In particular, is the transition state structure15) What is ma jor product for: X EHM9 Br ) Hz O
- Rank the set of substituents below in order of priority according to the Cahn-Ingold-Prelog sequence rules. 1 = highest priority. (a) —CO₂H | (b) —CO2CH3 (c)-CH₂OH(d)-CH36. Considering following reactions concerted, predict the stereochemical modes involved and classify them. нн (a) 0 + (b) нн(2) Ⓒ on of KMnO4 ht рес CH₂C1₂ kicno h+ Sven Oxudation | (C) 2 N ht SOCI (ch3) Culi (e) OCH, M. (en) moint
- - consider both regio Selectivity and Stereoslectivita to Predict the praducts for the Se elimmations, KOIBU NaOme+ NH₂ HO Ja'qub ||| Tamsulosin is a pharmaceutical used to treat an enlarged prostate. Choose the compound that would be suitable for preparing the necessary diastereomeric salts to purify the racemic mixture of tamsulosin shown below. OH IV НО. O OH OH NH₂ OH OH A) I B) II D) IV1) ܘ ܐ H 2) [H2SO], MeOH 1) 03 2) DMS ܐ "11 H OH 'H