Homework Answers
Ester can be hydrolysed in the presence of acid or base. Hydrolysis of an ester in presence of base proceeds in the following steps:
step 1:
In this step, hydroxide ion acts as a nucleophile and add to the carbonyl carbon of ester to form a tetrahedral intermediate.
Step 2:
In this step, alkoxide ion acts as leaving the group and depart from the tetrahedral intermediate.
Step 3:
In this step, proton transfer takes place from carboxylic acid to alkoxide ion and sodium carboxylate and alcohol is formed.
Answer:
The true statement regarding the given ester hydrolysis is-
One of the products formed is CH3(CH2)12CO2Na
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What statement is TRUE about the mechanism for the reaction shown here? CHỊ(CH4)2COẠCH, CH,(CHỊ) CO,CH 2,...
What statement is TRUE about the mechanism for the reaction shown here? CH(CH) COACH CHỊ(CH3CO,CH NaOH...
What statement is TRUE about the mechanism for the reaction shown here? CH(CH) COACH CHỊ(CH3CO,CH NaOH excess heat CH,(CH2)2CO CHỊ Water attacks the carbonyl carbon to form a tetrahedral intermediate The first step of the reaction involves protonation of the ester carbonyl oxygen. One of the products formed is CH3(CH2)2CO Na. Water deprotonates the alpha carbon.
What statement is TRUE about the mechanism for the reaction shown here? CH(CH2)2CO CH -COẠCH NaOH...
What statement is TRUE about the mechanism for the reaction shown here? CH(CH2)2CO CH -COẠCH NaOH CH3(CH)1200CH excess heat CH(CH3COACH Water attacks the carbonyl carbon to form a tetrahedral intermediate. The first step of the reaction involves protonation of the ester carbonyl oxygen. One of the products formed is glycerol. The hydroxide deprotonates the alpha carbon. Which bases among the following is/are used for irreversible enolate formation of acetaldehyde? NaH NaOMe II LDA III NaNH2 IV NaOH y II and...
What statement is TRUE about the mechanism for the reaction shown here? CH;(CH)2CO,CH CH;(CH)2CO,CH „CO.CH NaOH...
What statement is TRUE about the mechanism for the reaction shown here? CH;(CH)2CO,CH CH;(CH)2CO,CH „CO.CH NaOH CH;(CH)12CO,CH excess heat One of the products formed is ethylene glycol. The hydroxide deprotonates the alpha carbon. The first step of the reaction involves protonation of the ester carbonyl oxygen. The hydroxide attacks the carbonyl carbon to form a tetrahedral intermediate.
What product is expected from the tollowmg reaction но 1. LiAH cther 2. Но Оно ОН...
What product is expected from the tollowmg reaction но 1. LiAH cther 2. Но Оно ОН ОН ОН но ОН What statement is TRUE about the mechanism for the reaction shown here? CH,(CH2)2CO,CH CH3(CH)12CO,CH „Coch! NaOH excess heat CH3(CH)2CO,CH, Water attacks the carbonyl carbon to form a tetrahedral intermediate. The first step of the reaction involves protonation of the ester carbonyl oxygen. One of the products formed is glycerol. The hydroxide deprotonates the alpha carbon.
What is the IUPAC name of the given molecule? OH Br 1-bromo-2-ethyl-2-hydroxy-3-methylpentanoic acid 2-ethyl-3-methylpentan-2-ol-1-carboxyl bromide 2-ethyl-3-methyl-2-ol-pentanoyl...
What is the IUPAC name of the given molecule? OH Br 1-bromo-2-ethyl-2-hydroxy-3-methylpentanoic acid 2-ethyl-3-methylpentan-2-ol-1-carboxyl bromide 2-ethyl-3-methyl-2-ol-pentanoyl bromide O2-ethyl-2-hydroxy-3-methylpentanoyl bromide What statement is TRUE about the mechanism for the reaction shown here? CH,(CH)2CO,CH, NaOH CH3(CH12COCH excess heat CH3(CH)2CO,CH2 Water attacks the carbonyl carbon to form a tetrahedral intermediate. The first step of the reaction involves protonation of the ester carbonyl oxygen. One of the products formed is glycerol. The hydroxide deprotonates the alpha carbon. Which bases among the following is/are used...
Choose the correct starting materials for the following Diels-Alder product: A CHO CHO CHO CHO CHO...
Choose the correct starting materials for the following Diels-Alder product: A CHO CHO CHO CHO CHO Doc CHO CHO CHO CHO 2.1 CHO Question 10(4 points) Which one of these compounds is insoluble in water, but soluble in both NaHCO3(aq) and NaOH(aq)? Ophenol O octanal O propanoic acid Op-methylbenzoic acid The best way to synthesize the following amine is: NH 2 H, N 1. NBS, bv 2. NaNH NHI O 1. NACN 2. LAIH 3. H,0 1. H.00 2. ex...
Which of the following statement is correct about the mechanism of hemiacetal and acetal formation? A....
Which of the following statement is correct about the mechanism of hemiacetal and acetal formation? A. In the hemiacetal formation mechanism, the oxygen on the alcohol uses its lone pair to "attack the carbonyl carbon before the protonation of the carbonyl oxygen B. The carbocation formation is not favored during the hemiacetal formation mechanism, this is why hemiacetal are generally unstable and very reactive C. In the acetal formation mechanism, hydrolysis of water to the hemiacetal carbon center occurs as...
СО cat. H + NH2CH3 + H2CO2C CO2CH3 CO CHE Cocaine has been prepared by a...
СО cat. H + NH2CH3 + H2CO2C CO2CH3 CO CHE Cocaine has been prepared by a sequence beginning with a Mannich reaction between dimethyl acetonedicarboxylate, methylamine, and butanedial. The mechanism involves the following steps: 1. Following initial protonation of the carbonyl oxygen, nucleophilic attack by the amine forms carbinolamine 1; 2. Proton transfer and elimination of water forms iminium ion 2; he enol form of the dicarboxylate ester attacks the iminium ion to form adduct 3; 4. Adduct 3 tautomerizes...
help Which one is the major product of the following reaction sequence? 1. excess CHI 2....
help
Which one is the major product of the following reaction sequence? 1. excess CHI 2. Ag,0,H,O heat NH2 о What happens in the first step of this reaction? не OH + H2O OH The carbonyl carbon becomes protonated The water becomes protonated The sp oxygen of the ester becomes protonated The carbonyl oxygen becomes protonated
No No What is the most likely mechanism for the reaction below? (HỤC HC-N-CH(CH4)2 Oswa Os...
No No What is the most likely mechanism for the reaction below? (HỤC HC-N-CH(CH4)2 Oswa Os o sul What is the most likely mechanism for the reaction below? Br (H3C)HC-N-CH(CH3)2 O SN²
What statement is TRUE about the mechanism for the reaction shown here? CH(CH) COACH CHỊ(CH3CO,CH NaOH excess heat CH,(CH2)2CO CHỊ Water attacks the carbonyl carbon to form a tetrahedral intermediate The first step of the reaction involves protonation of the ester carbonyl oxygen. One of the products formed is CH3(CH2)2CO Na. Water deprotonates the alpha carbon.
What statement is TRUE about the mechanism for the reaction shown here? CH(CH2)2CO CH -COẠCH NaOH CH3(CH)1200CH excess heat CH(CH3COACH Water attacks the carbonyl carbon to form a tetrahedral intermediate. The first step of the reaction involves protonation of the ester carbonyl oxygen. One of the products formed is glycerol. The hydroxide deprotonates the alpha carbon. Which bases among the following is/are used for irreversible enolate formation of acetaldehyde? NaH NaOMe II LDA III NaNH2 IV NaOH y II and...
What statement is TRUE about the mechanism for the reaction shown here? CH;(CH)2CO,CH CH;(CH)2CO,CH „CO.CH NaOH CH;(CH)12CO,CH excess heat One of the products formed is ethylene glycol. The hydroxide deprotonates the alpha carbon. The first step of the reaction involves protonation of the ester carbonyl oxygen. The hydroxide attacks the carbonyl carbon to form a tetrahedral intermediate.
What product is expected from the tollowmg reaction но 1. LiAH cther 2. Но Оно ОН ОН ОН но ОН What statement is TRUE about the mechanism for the reaction shown here? CH,(CH2)2CO,CH CH3(CH)12CO,CH „Coch! NaOH excess heat CH3(CH)2CO,CH, Water attacks the carbonyl carbon to form a tetrahedral intermediate. The first step of the reaction involves protonation of the ester carbonyl oxygen. One of the products formed is glycerol. The hydroxide deprotonates the alpha carbon.
What is the IUPAC name of the given molecule? OH Br 1-bromo-2-ethyl-2-hydroxy-3-methylpentanoic acid 2-ethyl-3-methylpentan-2-ol-1-carboxyl bromide 2-ethyl-3-methyl-2-ol-pentanoyl bromide O2-ethyl-2-hydroxy-3-methylpentanoyl bromide What statement is TRUE about the mechanism for the reaction shown here? CH,(CH)2CO,CH, NaOH CH3(CH12COCH excess heat CH3(CH)2CO,CH2 Water attacks the carbonyl carbon to form a tetrahedral intermediate. The first step of the reaction involves protonation of the ester carbonyl oxygen. One of the products formed is glycerol. The hydroxide deprotonates the alpha carbon. Which bases among the following is/are used...
Choose the correct starting materials for the following Diels-Alder product: A CHO CHO CHO CHO CHO Doc CHO CHO CHO CHO 2.1 CHO Question 10(4 points) Which one of these compounds is insoluble in water, but soluble in both NaHCO3(aq) and NaOH(aq)? Ophenol O octanal O propanoic acid Op-methylbenzoic acid The best way to synthesize the following amine is: NH 2 H, N 1. NBS, bv 2. NaNH NHI O 1. NACN 2. LAIH 3. H,0 1. H.00 2. ex...
Which of the following statement is correct about the mechanism of hemiacetal and acetal formation? A. In the hemiacetal formation mechanism, the oxygen on the alcohol uses its lone pair to "attack the carbonyl carbon before the protonation of the carbonyl oxygen B. The carbocation formation is not favored during the hemiacetal formation mechanism, this is why hemiacetal are generally unstable and very reactive C. In the acetal formation mechanism, hydrolysis of water to the hemiacetal carbon center occurs as...
СО cat. H + NH2CH3 + H2CO2C CO2CH3 CO CHE Cocaine has been prepared by a sequence beginning with a Mannich reaction between dimethyl acetonedicarboxylate, methylamine, and butanedial. The mechanism involves the following steps: 1. Following initial protonation of the carbonyl oxygen, nucleophilic attack by the amine forms carbinolamine 1; 2. Proton transfer and elimination of water forms iminium ion 2; he enol form of the dicarboxylate ester attacks the iminium ion to form adduct 3; 4. Adduct 3 tautomerizes...
help
Which one is the major product of the following reaction sequence? 1. excess CHI 2. Ag,0,H,O heat NH2 о What happens in the first step of this reaction? не OH + H2O OH The carbonyl carbon becomes protonated The water becomes protonated The sp oxygen of the ester becomes protonated The carbonyl oxygen becomes protonated
No No What is the most likely mechanism for the reaction below? (HỤC HC-N-CH(CH4)2 Oswa Os o sul What is the most likely mechanism for the reaction below? Br (H3C)HC-N-CH(CH3)2 O SN²
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