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- Propose a mechanism for the conjugate addition of a nucleophile (Nuc:-) to acrylonitrile(H2C“CHCN) and to nitroethylene. Use resonance forms to show how the cyano andnitro groups activate the double bond toward conjugate addition.MECHANISM ACTIVITY Base-Induced Ester Hydrolysis (Saponification) NOC XT Step 1: Nucleophilic addition of hydroxide ion to the ester carbonyl group Ahrs MPR R16 H3C. R Part A (1 of 2) Draw the curved arrows for Step 1 of this mechanism. Arrow-pushing Instructions CH3 H-O: ÖH OR' :Ö H-O: O: H H H H 1x xxx CH3 CH3 Step 1 H3C. CH3 заOH H₂SO4 HỌC–CH2–CH2CH3 H,C=CH—CH,—CH3 + H₂O Acid-catalyzed dehydration of 1-butanol yields 1-butene as the major product. Draw curved arrows to show the movement of electrons in this step of the reaction mechanism. Arrow-pushing Instructions H2C=CH=CH2CH3 NOC XT + OH₂ HỌC–CH—CH, CH3 I H H-O-H
- The reaction of methylpropene with HBr, under radical conditions, gives two intermediates. Propose a mechanism for the formation of the two products. Propose a mechanism for the following reaction and use electronic factors to account for the formation of a major product: CH2 CH2Br N-Bromosuccinimide (NBS) ho, CCI4 Draw the structure of an antioxidant, Vitamin E free radical and use resonance structures o account for its stability.b) Refer to the following equation to answer Q3b (i), (ii) and (iii). CH3 H,SO, Н—с—он C-CH3 ? + H2O Но- ČH3 (i) Determine the product of the above reaction. (ii) Name the above reaction. (iii) Propose the mechanism for the above reaction.8. Predict the products of the following reactions and propose a complete mechanism for each reaction. 1 Hg(OAc). CH;OH, 2 NABH, CH, CH,CH,CH=CH, 1. BH3. THF 2. H,O». OH
- Complete the reaction scheme below. Show all reagents and intermediates. No reaction is a possible answer. 1) CH3CH2M9B CH3OH H+ (ехcess) но 2) H30*, H2O B A OCH3i) ii) 1. Propose a mechanism for the following reactions. H (CH3)2NH H* NaOH EtOHWhat is the correct sequence of steps for the following transformation? Step 1 Step 2 HO (a) HBr, followed by H20 (b) H2 over Lindlar's catalyst, followed by H2O/H,SO4 (c) H2O/H2SO4/H&SO4, followed by HBr (d) H2 over Pd/C, followed by H20 Which structure corresponds to the missing step in the reaction mechanism for the conversion of the alkene/alcohol to the cyclic ether? HC! H20 + H;O OH OH OH (a) (b) (c) (d)
- This is a multistep syntheses. More than one reagent/reaction will be necessary to produce the product. Provide all necessary reaction conditions (HBr, HgSO4, etc.) and the products produced after each step of the synthesis.Neopentyl alcohol, (CH3)3CCH2OH, reacts with concentrated HBr to give 2-bromo2-methylbutane, a rearranged product. Propose a mechanism for the formation of thisproduct.In the reaction from compound 10 to compound 11, why the C=C bond is retained and is not hydrogenated? f) LiAlH4, Et2O, 08C; g) Ac2O, py, DMAP, CH2Cl2, RT, 77% over 2 steps;