13. Which of the following would form an enolate ion on treas Ci, Cu.cu cusca.c
ID: 303976 • Letter: 1
Question
13. Which of the following would form an enolate ion on treas Ci, Cu.cu cusca.c CH CH a. A b. B ?.? d. D All of these except C e. 14. Which of the following does not represent a similarity between nitriles and carboxylic acids? a. contain 3 carbon bonds to an eiectronegative element b, c. d. e. contain two ? bonds. act as electrophiles undergo nucleophilic substitution reactions all of these are characteristic of both nitriles and carboxylic acids. 15. Which of the following is the correct assignment of the classes of the following compounds? 0 0 HyC CH3 mide 1 lactone; 2-ester, 3- amide 1-ester, 2 = ester; 3-mide é a. c. 1-ester; 2-imide; 3- amide d. 1- lactone; 2- anhydride; 3 imide 16. Which of the following is the correct order of decreasing reactivity in hydrolysis reactions (more ro less reactive)? a. anhydrides> amides> acid chlorides b. amides> acid chlorides> anhydrides c. anhydrides>acid chlorides > amides ? acid chlorides > anhydrides> amidesExplanation / Answer
13. Except C all the structures can form enolate ion when treated with a base. This is because, to get tautomerised it is mandatory for alpha carbon to be sp3 hybridised and contains atleast one alpha hydrogen.
14. (a) (b) (d) are not representing similarity between nitriles and carboxylic acids. The statements of (a)(b) and (d) are only true for nitriles as nitriles have a triple bond between carbon and nitrogen and nitrogen is more electronegative than carbon. Nitriles have 2 pi bonds and also undergoes nucleophilic substitution reaction while carboxylic acids do not.
15. (i) Lactones (ii) Anhydride (iii) Imide
16. Acid chloride > Anhydride > Amide. This is because the reactivity of acid chloride is highest due to the high electronegativity and good leaving ability of chlorine.
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