only structure A is enolate formed by ester.
51. Which structure represents an ester enolate? A) 0 CH3CH2OC=CHCH3 CH3CH2OCCHCH3 C) 0 CH2=CHOCCH2CH3 D) :...
The following structure represents an intermediate formed by addition of an ester enolate ion to a second ester molecule. Draw the reactant. ball & stick Blabels • You do not have to consider stereochemistry, • You do not have to explicitly draw Hatoms. • Do not include lone pairs in your answer. They will not be considered in the grading С P 012 <
Which of the following compounds exhibit geometric isomerism? A. CCl2=CHBO B. (CH3)2C=CHCH3 OC. CH2=CHCH3 OD. CCl2=CBr2 E. CH3CH=CHCH3
19) The structure is that of a CH3-(CH2)14-0-0-(CH2)25-CH3 A) fatty acid B) steroid C) wax D) triacylglycerol E) glycerophospholipid 20) What type of lipid is the following compound? CH,OC(CH2) 16CH3 10 CHOC(CH2) 14CH3 CHOC(CH2)18CH A) steroid B) bile salt C) glycerophospholipid D) triacylglycerol E) wax
Claisen Condensations Claisen condensations involve the enolate anion of an ester which acts as a nucleophile attacking another molecule of ester. The resulting product of this reaction is a Beta-ketoester. Draw the enolate anion which serves as the nucleophile in the reaction above. Draw the resonance structure of this enolate. Look at the mechanism of this reaction in your textbook (7^th edition), pages 773-774. What type of reaction does this resemble, S_N1,S_N2, E1, or E2? Ethanol is one of the...
6. What would be the major product of the dehydrohalogenation of 3-chloropentane by KOH? CH3 CH2 CCH2CH3 (B) CH3 CH3C-CHCH3 (C) CH2 CHCH2CH2CH3 (D) CH3CH CHCH2CH3
6. What would be the major product of the dehydrohalogenation of 3-chloropentane by KOH? CH3 CH2 CCH2CH3 (B) CH3 CH3C-CHCH3 (C) CH2 CHCH2CH2CH3 (D) CH3CH CHCH2CH3
Question 31 Which is the IUPAC name for the structure shown below? Br A. (S)-5-Bromo-2-heptanal B. (R)-3-Bromopentyl methyl ketone C. (S)-5-Bromo-2-heptanone D. (R)-5-Bromo-2-heptanone E. (R)-5-Bromo-2-heptanal Question 32 Which structure represents an ester enolate? 09 I ΠΙ IV II A.1 B. II C. III D. IV E. Two of these choices.
13) Which of the following is/are the main product(s) of the following reaction? (2 pts) CH2=CH-CH-CH2 HBr ? A) CH2CH=CHCH3 CH2CH2CH=CH2 C) CH3CHCH=CH2 D) A and B E) A and C 14) What is/are the product(s) from the following reaction? (2 pts) e + Ha ? CHCH A) I only B) Il only C) I is minor, II is major D) I is major, II is minor E) equal amounts of I and II 16) Provide the structure of the...
Which of the following can exist in enantiomers? a. b. CH3 CH3-CH;-CH2-C-CH; CH3-CH2-CEC-CH, C. d. all of these choices CH3-CH-C-CHE -8-сон, CH,-8-3-CH, спесне: -он, 10. What type of compound is the second product in the reaction shown below? CH-0-2-CH, OCH & CHOCH, H,CH, +3 NaOH + CH-OH + CH-OH CH -0-C-(CH2)16CH, a, fatty acid salt b. ester CH-OH c. alcohol d. fatty acid
Give common names: a. C CHZ CH-CH3 OH ?. d. CH3 CH2-0-CH2-CH2-CH2-CH3 b. 0 CH2 CH CH2 CH2 CH3 CH2CH3 2 e. CH3 N CH2-CH2-CH3
PayЕ 30-Which structure among the following represents an amide (protein) bond? A) —N=C=0 C-NH- -C-NH- C-0- 31-Which type of forces form the primary structure of a protein? 32-The two protein chains in insulin are held together by 33-Keratin, the protein of hair and skin, has extensive sections with which secondary structure? 34-The beta-pleated sheet is an example of 35-The type of bond that is most important in maintaining secondary structure of a protein is 36-All of the following are examples...