Please answer me with good quality!!!!!!!! All details And Mechnism if it\'s org
ID: 1074261 • Letter: P
Question
Please answer me with good quality!!!!!!!!
All details
And
Mechnism if it's organic chemistry!!
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4 (d) It has the highest m/z value of all the peaks in the spectrum. (e) The base peak is assigned a relative abundance equal to that of the parent ion. (20) Which of the following statements describes the first step in the mechanism of the aldol (a) An -hydrogen is abstracted by the base to form an enolate anion. (b) A nucleophilic base attacks the carbonyl carbon atom. (e) The carbonyl oxygen is protonated by the base ion. (d) The carbonyl oxygen of one aldehyde atacks the carbonyl carbon of another 3. What is hyperconjugation? How does it affect carbocation stability ? (5 %) 4. Rank the following species in an order of decreasing reactivity. (8 %) (a) leaving group: F, r, H20, NH2 (b) nucleophile (in methanol): Br, HON,, HS 5. Rank the following compounds in an order of decreasing rate in an E2 reaction. (4 %) CH CH, Br Br Br CH 6 Propose the plausible mechanisms for each of the following reactions. (10 %) OH H,SO4 CH-CH2 H,o, HCCI, e- 7 3303 8 ·111P 7. How could you distinguish among the following compounds using their infrared spectra and 'H NMR spectra. (6%) H,OH CHOH COOH COHExplanation / Answer
20 (a) An alpha-hydrogen is abstracted by the base to form an enolate ion.
An aldol condensation is a condensation reaction between an enol or an enolate ion with a carbonyl compound to form a -hydroxy carbonyl and subsequent dehydration to give a alpha beta unsaturated carbonyl compounds. Thus, option B and D is ruled out. Base cannot protonate carbonyl oxygen, which rules out option C. Thus, the correct answer is A.