Shown below is an acid-catalyzed halogenation of a ketone.
Shown below is an acid-catalyzed halogenation of a ketone. What would be the first step in the mechanism?
Enolate attacks the halogen
Base deprotonates the alpha-carbon
Nucleophile attacks carbonyl carbon
Protonate the carbonyl oxygen
Homework Answers
What is the organic product In the mechanism of the acid-catalyzed halogenation of ketones, which of...
What is the organic product In the mechanism of the acid-catalyzed halogenation of ketones, which of the following is NOT true? A. The rate-determining step is the attachment of a halogen atom to an enol intermediate B. The first step is attachment of H^+ to the carbonyl oxygen. C. The reaction rate is independent of the halogen (X_2) concentration. D. The rate-determining step is the loss of an H^+ from an alpha-carbon to form an enol Intermediate.
In the mechanism of the acid-catalyzed halogenation of ketones, which of the following is NOT true?...
In the mechanism of the acid-catalyzed halogenation of ketones, which of the following is NOT true? Select one A. The rate-determining step is the attachment of a halogen atom to an enol intermediate. O B. The first step is attachment of Ht to the carbonyl oxygern. O C. The reaction rate is independent of the halogen (X2) concentration D. The rate-determining step is the loss of an H* from an alpha- carbon to form an enol intermediate
please circle answer Shown below is the reaction between a nitrile and a Grignard reagent. What...
please circle answer
Shown below is the reaction between a nitrile and a Grignard reagent. What would be the first step in the mechanism? CN - 1. CH3MgBr 2. H307 Nucleophile attacks nitrile carbon Hydrolysis of the nitrile Protonate the nitrile nitrogen Base Beprotonates the alpha-carbon An unknown compound shows an infrared absorption around 2250 cm (medium intensity). What structural fragment could be causing this absorption? carbonyl OOH nitrile N-H NH 1. (CH3)2CHCOCI, pyridine 2. LIAIH4 3. H2O Product tertiary...
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) 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;(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 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? CHỊ(CH4)2COẠCH, CH,(CHỊ) CO,CH 2, CO,CH NAOH excess heat CHỊ(CH) CÓ 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 CH3(CH2)2CO2Na. Water deprotonates the alpha carbon.
In step I the alpha bromination of ketones is acid catalyzed.
1. In step I the alpha bromination of ketones is acid catalyzed. a. What acid is formed as Step 1 progresses? b. Why are alpha bromination reactions acid catalyzed? 2. Substitution of bromine by t-butyl amine is the second step of the reaction today. Secondary alkyl halides can undergo substitution by Sn1 or Sn2 mechanisms. Explain (in terms of electronic interactions) why an Sn2 mechanism is favored when the halogen is alpha to a carbonyl. (Hint: Like charges on adjacent atoms are unfavorable)
Draw the different geometric isomers for dibenzalacetone (there are 3 of them). Why is the trans...
Draw the different geometric isomers for dibenzalacetone (there are
3 of them). Why is the trans isomer formed in this experiment?
The purpose of this experiment is to svnthesize dibenzalacetone (trans, trans-1. 5-diphenvl-1.4 pentadien-3-one) through the Aldol condensation of acetone with benzaldehyde. The synthesis begins bv using a strong base to generate the acetone enolate ion. Water (not shown) is formed as a byproduct. The equilibrium position of this reaction strongly favors the starting acetone, and the amount of acetone...
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...
What is the organic product In the mechanism of the acid-catalyzed halogenation of ketones, which of the following is NOT true? A. The rate-determining step is the attachment of a halogen atom to an enol intermediate B. The first step is attachment of H^+ to the carbonyl oxygen. C. The reaction rate is independent of the halogen (X_2) concentration. D. The rate-determining step is the loss of an H^+ from an alpha-carbon to form an enol Intermediate.
In the mechanism of the acid-catalyzed halogenation of ketones, which of the following is NOT true? Select one A. The rate-determining step is the attachment of a halogen atom to an enol intermediate. O B. The first step is attachment of Ht to the carbonyl oxygern. O C. The reaction rate is independent of the halogen (X2) concentration D. The rate-determining step is the loss of an H* from an alpha- carbon to form an enol intermediate
please circle answer
Shown below is the reaction between a nitrile and a Grignard reagent. What would be the first step in the mechanism? CN - 1. CH3MgBr 2. H307 Nucleophile attacks nitrile carbon Hydrolysis of the nitrile Protonate the nitrile nitrogen Base Beprotonates the alpha-carbon An unknown compound shows an infrared absorption around 2250 cm (medium intensity). What structural fragment could be causing this absorption? carbonyl OOH nitrile N-H NH 1. (CH3)2CHCOCI, pyridine 2. LIAIH4 3. H2O Product tertiary...
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) 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;(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 statement is TRUE about the mechanism for the reaction shown here? CHỊ(CH4)2COẠCH, CH,(CHỊ) CO,CH 2, CO,CH NAOH excess heat CHỊ(CH) CÓ 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 CH3(CH2)2CO2Na. Water deprotonates the alpha carbon.
Draw the different geometric isomers for dibenzalacetone (there are
3 of them). Why is the trans isomer formed in this experiment?
The purpose of this experiment is to svnthesize dibenzalacetone (trans, trans-1. 5-diphenvl-1.4 pentadien-3-one) through the Aldol condensation of acetone with benzaldehyde. The synthesis begins bv using a strong base to generate the acetone enolate ion. Water (not shown) is formed as a byproduct. The equilibrium position of this reaction strongly favors the starting acetone, and the amount of acetone...
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...
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