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Which of the following conditions will drive the equilibrium of the Fischer esterification towards ester formation?...
1) What is the main intramolecular force between two molecules of propanoic acid? A) hydrogen bonding...
1) What is the main intramolecular force between two molecules of propanoic acid? A) hydrogen bonding B) London dispersion forces C) dipole-dipole interaction D) induced dipole interactions 2) Acetyl chloride undergoes nucleophilic acyl substitution faster than methyl acetate because A) methoxide ion is a better leaving group than chloride ion. B) the ester is more sterically hindered than the acyl chloride. C) chloride ion is a better leaving group than methoxide ion. D) esters hydrolyze faster than acid chlorides. 3)...
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...
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...
Ph3P CH3 Ph H3C H3C Eto2C The Fischer esterification reaction synthesizes an ester via a nucleophilic...
Ph3P CH3 Ph H3C H3C Eto2C The Fischer esterification reaction synthesizes an ester via a nucleophilic acyl substitution reaction The stereochemistry the alcohol oxygen that makes the nucleophilic attack. The Mitsunobu reaction, on the other hand, allows the synthesis of an ester in which the stereochemistry of the alcohol is inverted. The reaction involves a carboxylic acid and an alcohol, as well as triphenylphosphine and an azo compound termed diethyl azodicarboxylate DEAD). As with the Fischer esterification, H20 is formally...
_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
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. A B C D
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....
A Fischer Esterification reaction is an equilibrium reaction that does not favor the formation of product....
A Fischer Esterification reaction is an equilibrium reaction that does not favor the formation of product. Which of the following would NOT shift the equilibrium towards products? O Addition of Water to the reaction flask. O Removal of water from the reaction. O Removal of product from the reaction flask. O Addition of a large excess of one of the starting materials.
Spid deri 7. What is the order of DECREASING reactivity toward nucleophilic acyl substitution for these...
Spid deri 7. What is the order of DECREASING reactivity toward nucleophilic acyl substitution for these carboxylic acid derivatives (most reactive first)? 9. Using your knowledge of organic chemistry, what is the order from most reactive to least reactive of these esters toward a nucleophile? och la NHCH I NHCH 1 2 (a) II, IV, III, I (b) I, II, III, IV (a) 1 > 2 > 3 (b) 3 >1 > 2 (c) 2 > 3 > 1 >2...
Ester Synthesis In today's lab, you will perform small scale Fischer esterifications to make a variety...
Ester Synthesis In today's lab, you will perform small scale Fischer esterifications to make a variety of esters. H2SO4 R OH + R'OH = ROR' Combinatorial chemistry is a term used to describe small scale reactions, where in a large number of different molecules can be made using the same reaction conditions, by varying the reactants. In the case of Fischer esterifications, one can vary the carboxylic acid and keep the alcohol constant or keep the carboxylic acid constant and...
1) What is the main intramolecular force between two molecules of propanoic acid? A) hydrogen bonding B) London dispersion forces C) dipole-dipole interaction D) induced dipole interactions 2) Acetyl chloride undergoes nucleophilic acyl substitution faster than methyl acetate because A) methoxide ion is a better leaving group than chloride ion. B) the ester is more sterically hindered than the acyl chloride. C) chloride ion is a better leaving group than methoxide ion. D) esters hydrolyze faster than acid chlorides. 3)...
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...
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...
Ph3P CH3 Ph H3C H3C Eto2C The Fischer esterification reaction synthesizes an ester via a nucleophilic acyl substitution reaction The stereochemistry the alcohol oxygen that makes the nucleophilic attack. The Mitsunobu reaction, on the other hand, allows the synthesis of an ester in which the stereochemistry of the alcohol is inverted. The reaction involves a carboxylic acid and an alcohol, as well as triphenylphosphine and an azo compound termed diethyl azodicarboxylate DEAD). As with the Fischer esterification, H20 is formally...
_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
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....
A Fischer Esterification reaction is an equilibrium reaction that does not favor the formation of product. Which of the following would NOT shift the equilibrium towards products? O Addition of Water to the reaction flask. O Removal of water from the reaction. O Removal of product from the reaction flask. O Addition of a large excess of one of the starting materials.
Spid deri 7. What is the order of DECREASING reactivity toward nucleophilic acyl substitution for these carboxylic acid derivatives (most reactive first)? 9. Using your knowledge of organic chemistry, what is the order from most reactive to least reactive of these esters toward a nucleophile? och la NHCH I NHCH 1 2 (a) II, IV, III, I (b) I, II, III, IV (a) 1 > 2 > 3 (b) 3 >1 > 2 (c) 2 > 3 > 1 >2...
Ester Synthesis In today's lab, you will perform small scale Fischer esterifications to make a variety of esters. H2SO4 R OH + R'OH = ROR' Combinatorial chemistry is a term used to describe small scale reactions, where in a large number of different molecules can be made using the same reaction conditions, by varying the reactants. In the case of Fischer esterifications, one can vary the carboxylic acid and keep the alcohol constant or keep the carboxylic acid constant and...
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