Which of the following statements is NOT true about acid anhydrides? A. Acid anhydrides are more...
Which of the following statements is NOT true about acid anhydrides?
A. Acid anhydrides are more reactive than esters but less reactive than acyl chlorides.
B. An acid anhydride reacts with water to form an ester product.
C. Acid anhydrides eliminate a carboxylate ion as a leaving group.
D. An acid anhydride is considered to have a better leaving group (i.e. weaker base) than the leaving groups of esters, carboxylic acids, and amides.
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A |
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B |
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D |
Homework Answers
Option B) is not true.
Acid anhydride react with water to form corresponding carboxylic acid, not ester.
acid anhydride which is more reactive than ester and lesser
reactive than acyl chloides. Acid anhydride eliminates carboxylate
ion as a leaving group. For a clarity, the reaction is given as
follows,
Add Answer to:
Which of the following statements is NOT true about acid
anhydrides?
A. Acid anhydrides are more...
The reactivity sequence of carboxylic acid derivatives (acyl halides, anhydrides, acids, esters, amides) changes with t...
The reactivity sequence of carboxylic acid derivatives (acyl halides, anhydrides, acids, esters, amides) changes with the substituent. Acyl chlorides are most reactive, amides are least reactive. 1) Explain in detail why the reactivity changes in that sequence, 2) Where do carboxylates fit in that sequence and why? How does that impact on the way carboxylic acid reactions need to run? 3) Where do thioesters, RC(-O)SMe and acyl phosphates, RC(-O)OPO2OR fit in that sequence. Explain your decision
The reactivity sequence of...
Which of the following is cyclohexane-1,4-dicarboxylic anhydride? Which of the following statemen...
Which of the following is cyclohexane-1,4-dicarboxylic anhydride? Which of the following statements is true? A. Ester formation reactions are more violent and less easily controlled when anhydrides are uscd in place of acid chlorides. B. An acid chloride is most reactive of the common carboxylic acid derivatives because the chlorine atom causes a destabilizing inductive effect upon the carbon atom of the carbonyl group. C. Amides are more reactive than esters towards nucleophilic attack because nitrogen is less electronegative than...
True or false: a) The electron-withdrawing substituents do not impact the acidity of carboxylic acids. b)...
True or false: a) The electron-withdrawing substituents do not impact the acidity of carboxylic acids. b) Hydrolysis of nitriles is a method to synthesize carboxylic acid. c) The order of reactivity of carboxylic acid derivatives is as follow: Acyl chloride > Acid anhydride > Ester > Amide. d) SOCl2, PCl3 and PCl5 are three types of special reagents to convert carboxylic acid to acyl chloride. e) Acyl chlorides are the most reactive common acyl derivatives, and can be used to...
will the following reaction occur as written? CH3NH2 он A) Yes, anhydrides can be converted into...
will the following reaction occur as written?
CH3NH2 он A) Yes, anhydrides can be converted into amides and carboxylic acids since the leaving group is a weaker base than CH3NH2. B) No, anhydrides cannot be converted into amides and carboxylic acids since the leaving group is a stronger base than CH3NH2. C) Yes, anhydrides can be converted into amides and carboxylic acids since the products have a greater amount of hydrogen-bonding. D) No, anhydrides cannot by converted into amides and...
Answer the following questions with only one answer a. Carboxylic acid derivatives cannot be hydrolyzed to...
Answer the following questions with only one answer a. Carboxylic acid derivatives cannot be hydrolyzed to produce carboxylic acids b. Lithium aluminum (tri-butoxy)hydride will convert acid chlorides to ketones c. Amides have more resonance stability than esters d. Nitriles are less basic than primary amines e. Grignard reagents contain polar covalent carbon-magnesium bonds f. Anhydrides are more reactive than esters in nucleophilic acyl substitution reactions g. Acid chlorides undergo nucleophilic acyl substitution reactions h. Nitriles have an sp hybridized Nitrogen...
QUESTION 43 less reactive)? Which of the following is the correct order of decreasing reactivity in...
QUESTION 43 less reactive)? Which of the following is the correct order of decreasing reactivity in hydrolysis reactions (more reactive a acid chlorides > anhydrides >amides b. anhydrides > acid chlorides >amides camides > acid chlorides > anhydrides d. anhydrides >amides > acid chlorides QUESTION 44 Which of the following is the correct order of decreasing leaving group ability in nucleophilic acyl substitutions (better leaving group > worse leaving group)? a. NH2"> CH30">CH b.CP>CH:0">NH2 c.c"> N12"> CH30" d. CH30">Cr">NH12" QUESTION...
он он te Acetyl adenosyl phosphate A sum Table 21.1. nclature rules for carboxylic acid derivativ...
он он te Acetyl adenosyl phosphate A sum Table 21.1. nclature rules for carboxylic acid derivatives is given in able 21.1 Nomenclature of Carboxylic Acid Derivatives Functional group Structure Name ending -ic acid (-carboxylic acid) Carboxylic acid -oyl halide (-carbonyl halide) 0 Acid halide anhydride Acid anhydride -amide (-carboxamide Amide -oate (-carboxylate) Ester RT 、NH2 (NHR, NR2) -thioate (-carbothioate) Thioester -oyl phosphate 0 Acyl phosphate 3.) List the functional groups shown in table 21.1 on page 817 in order of...
Whicts b. B ?.? d. D e. All of these exeept C 14. Which of the...
Whicts b. B ?.? d. D e. All of these exeept C 14. Which of the following does not represent a similarity between nitriles and carboxylic ac a. contain 3 carbon bonds to an electronegative element b. e. d. e. all of these are characteristic of both nitriles and carboxylic acids. contain two st bonds. act as electrophiles undergo nucleophilic substitution reactions 15. Which of the following is the correct assignment of the classes of the following compounds? CH3 a....
Questions 12-20 are true and false! (12) Hydrolysis of nitriles is a method to synthesize carboxylic...
Questions 12-20 are true and false!
(12) Hydrolysis of nitriles is a method to synthesize carboxylic acid. (13) The order of reactivity of carboxylic acid derivatives is as follow: Acyl chloride > Acid anhydride > Ester > Amide. (14) SOCI2, PC13 and PCls are three types of special reagents to convert carboxylic acid to acyl chloride (15) Acyl chlorides are the most reactive common acyl derivatives, and can be used to synthesize anhydride, ester, and amide. (16) Acyl chloride is...
_15. The class least reactive towards acyl substitution is a. carboxylates b. esters c. acid anhydrides...
_15. The class least reactive towards acyl substitution is a. carboxylates b. esters c. acid anhydrides d. carboxylic acids e. acid halides f. amides _ 16. Acetals protect aldehyde carbonyl groups from all of the following except: a. acidic conditions b. nucleophiles c. organometallics H h O d. basic conditions are. hydride reduction
The reactivity sequence of carboxylic acid derivatives (acyl halides, anhydrides, acids, esters, amides) changes with the substituent. Acyl chlorides are most reactive, amides are least reactive. 1) Explain in detail why the reactivity changes in that sequence, 2) Where do carboxylates fit in that sequence and why? How does that impact on the way carboxylic acid reactions need to run? 3) Where do thioesters, RC(-O)SMe and acyl phosphates, RC(-O)OPO2OR fit in that sequence. Explain your decision
The reactivity sequence of...
Which of the following is cyclohexane-1,4-dicarboxylic anhydride? Which of the following statements is true? A. Ester formation reactions are more violent and less easily controlled when anhydrides are uscd in place of acid chlorides. B. An acid chloride is most reactive of the common carboxylic acid derivatives because the chlorine atom causes a destabilizing inductive effect upon the carbon atom of the carbonyl group. C. Amides are more reactive than esters towards nucleophilic attack because nitrogen is less electronegative than...
will the following reaction occur as written?
CH3NH2 он A) Yes, anhydrides can be converted into amides and carboxylic acids since the leaving group is a weaker base than CH3NH2. B) No, anhydrides cannot be converted into amides and carboxylic acids since the leaving group is a stronger base than CH3NH2. C) Yes, anhydrides can be converted into amides and carboxylic acids since the products have a greater amount of hydrogen-bonding. D) No, anhydrides cannot by converted into amides and...
Answer the following questions with only one answer a. Carboxylic acid derivatives cannot be hydrolyzed to produce carboxylic acids b. Lithium aluminum (tri-butoxy)hydride will convert acid chlorides to ketones c. Amides have more resonance stability than esters d. Nitriles are less basic than primary amines e. Grignard reagents contain polar covalent carbon-magnesium bonds f. Anhydrides are more reactive than esters in nucleophilic acyl substitution reactions g. Acid chlorides undergo nucleophilic acyl substitution reactions h. Nitriles have an sp hybridized Nitrogen...
QUESTION 43 less reactive)? Which of the following is the correct order of decreasing reactivity in hydrolysis reactions (more reactive a acid chlorides > anhydrides >amides b. anhydrides > acid chlorides >amides camides > acid chlorides > anhydrides d. anhydrides >amides > acid chlorides QUESTION 44 Which of the following is the correct order of decreasing leaving group ability in nucleophilic acyl substitutions (better leaving group > worse leaving group)? a. NH2"> CH30">CH b.CP>CH:0">NH2 c.c"> N12"> CH30" d. CH30">Cr">NH12" QUESTION...
он он te Acetyl adenosyl phosphate A sum Table 21.1. nclature rules for carboxylic acid derivatives is given in able 21.1 Nomenclature of Carboxylic Acid Derivatives Functional group Structure Name ending -ic acid (-carboxylic acid) Carboxylic acid -oyl halide (-carbonyl halide) 0 Acid halide anhydride Acid anhydride -amide (-carboxamide Amide -oate (-carboxylate) Ester RT 、NH2 (NHR, NR2) -thioate (-carbothioate) Thioester -oyl phosphate 0 Acyl phosphate 3.) List the functional groups shown in table 21.1 on page 817 in order of...
Whicts b. B ?.? d. D e. All of these exeept C 14. Which of the following does not represent a similarity between nitriles and carboxylic ac a. contain 3 carbon bonds to an electronegative element b. e. d. e. all of these are characteristic of both nitriles and carboxylic acids. contain two st bonds. act as electrophiles undergo nucleophilic substitution reactions 15. Which of the following is the correct assignment of the classes of the following compounds? CH3 a....
Questions 12-20 are true and false!
(12) Hydrolysis of nitriles is a method to synthesize carboxylic acid. (13) The order of reactivity of carboxylic acid derivatives is as follow: Acyl chloride > Acid anhydride > Ester > Amide. (14) SOCI2, PC13 and PCls are three types of special reagents to convert carboxylic acid to acyl chloride (15) Acyl chlorides are the most reactive common acyl derivatives, and can be used to synthesize anhydride, ester, and amide. (16) Acyl chloride is...
_15. The class least reactive towards acyl substitution is a. carboxylates b. esters c. acid anhydrides d. carboxylic acids e. acid halides f. amides _ 16. Acetals protect aldehyde carbonyl groups from all of the following except: a. acidic conditions b. nucleophiles c. organometallics H h O d. basic conditions are. hydride reduction
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