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- 3) Complete the following reactions show stereochemistry मैं OH 1. PBrs OH OH E 1. Ts-Cl 2. 1. LIAIH 2.H₂O* show stereochemistry16). What is the major product of the following reaction? N ZH ZH (A) Br Br 1 eqiv. Br₂ N (B) Br ? (C) XO Br 'N Br (D) Br, (E) Bra Draw the structure of the intermediate (I) for the reaction below. Hg(O2CCH3)2 NaBH4 Product CH;OH H3C • Use the wedge/hash bond tools to indicate stereochemistry where it exists. If the reaction produces a racemic mixture, just drawv one stereoisomer.
- Schlapbach and Hoffmann used a stereoelectronic effect to control the stereochemistry of the reaction below. Draw the structure of the transition states for competing reactions to explain the origin of stereoselectivity. lag X = CI, OR, N(Me)SO₂R R H + Me R OH Me XFor the reaction below, which one of the following possible products is most likely to form? (CH3)3CONA THE Br https://ibb.co/4TPJ2LH e https://ibb.co/2s1mWP9 2 https://ibb.co/fHsfhft a https://ibb.co/y0Cn8jY OcICHals https://ibb.co/CtzHTbx 2 https://ibb.co/ZghTKD6 eEXPLAIN THE MECHANISM OF EACH REACTION 3. Hydrogen Addition- Selectivity CH₂ H₂C- Catalyst CH₂ HH 4. Mechanism of Catalytic Hydrogenation H H Alkane product ⒸThomson-Brooks Cole -H Pd H H Hydrogen adsorbed on catalyst surface Regenerated catalyst H₂C CH₂ H H C C LIZ Complex of alkene to catalyst Η Η΄ CH₂ H H H Insertion of hydrogen into carbon-carbon double bond
- Dtermine the reagents that can accomplish the rxn CH2OH (1) Reagent ? (2) Reagent ? C9H1202 (4) Reagent ? (3) H+ a. (1) SOC12 (2) 1-propanol; (4) PCC/pyridine b. (1) NaH, (2) acetone, (4) NABH4 c. (1) NaH, (2) epoxide (4) PCC/pyridine d. (1) Jones reagent, (2) NaH, (4) epoxide3. Which polymer has higher Tg? O O 0 || -C(CH₂)4CNH(CH₂)6NH- C(CH₂)4CO(CH₂)40- (A VS. B) +CH₂-CH+ n 0 (C CH3 VS. formountain OCH 3 D)Draw a reaction mechanism illustrating the transition state structure and stereochemistry of the resulting product (if any).a. (R)-2-bromobutane + -OCH3 → (SN2)b. (S)-3-bromo-3-methylhexane + methanol → (SN1)c. 2-Chloro-2-methylhekxane + -OH → (E1)
- 7. Predict the product for each reaction shown below. (а) AIC13 .CI (b) AICI3 .CI (c) AICI3Identify the transition state for the reaction between tert-butyl chloride and sodium hydroxide. H H-c-H 8- 8- HO---- C- CI H3C CH3 H 8- Но- -H----c-H 8- HạC-C- ČH3 -CI H-c-H 8+ 8+ HO---- CI H3C CH3 H. &+ HO-----H----C 8+ H3C-C----CI ČH3 %3In the following substitution reaction: the rate does not depend on type of X [Co(NH3)5H20]3+ + Xn-rightwards arrow with blank on top [Co(NH3) 5X]3-n + H2O True or false