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Total Marks 53 Q1. True / False 1. Tertiary hydrogen is more reactive than secondary hydrogen...
4) (marks-1.5) Please answer the following as TRUE or FALSE in the space provided to the...
4) (marks-1.5) Please answer the following as TRUE or FALSE in the space provided to the left of each statement (0.5 marks each). True/False a) Tertiary alkyl halides only participate in SN1 reactions. b) CH3O- is a better nucleophile for an SN2 reaction than CH3S-when in methanol. c) Complete hydrogenation of Limonene (drawn below) will produce two stereoisomers.
5) (marks = 3) Please answer the following as TRUE or FALSE in the space provided...
5) (marks = 3) Please answer the following as TRUE or FALSE in the space provided to the left of each statement (0.5 marks each). True/False All tertiary alkyl halides only participate in SN 1 reactions. CH30 is a better nucleophile for an SN2 reaction than CH3S when in methanol. The relative stability of carbanions is as follows: (most stable) 1° >2 > 30 (least stable) Unlike other alkyl halides (CI, Br, 1), alkyl fluorides do not participate in substitution...
Part 2 Multiple Choice. Select the best answer for each of the questions below: 1. Which...
Part 2 Multiple Choice. Select the best answer for each of the questions below: 1. Which of these molecules is not an electrophile? a) CH4 b) CH3+ c) H* d) BF3 2. Which of these molecules is not a nucleophile ? a) NH3 b) OH c) CN d) H* 3. Water behaves as: a) a nucleophile b) an electrophile c) both d) neither 4. The SN2 reaction has how many steps? a) 1 b) 2 c) 3 d) 4 5....
1. In both the sodium iodide test and the silver nitrate test, why does 2-bromobutane react faster...
1. In both the sodium iodide
test and the silver nitrate test, why does 2-bromobutane react
faster than 2-chlorobutane?
Bromine is a better leaving group since it is a weaker base than
chlorine is.
2. a. Why does benzyl chloride react under both
SN1 and SN2 conditions?
Benzyl
chloride is a primary alkyl halide, hence reactive under SN2
conditions.
The
primary carbocation formed due to the departure of Cl- is
stabilized by the pi electrons in the benzene ring.
b. Why is...
ChemActivity 10: Oxidation and Reduction 145 Model 7: Primary (1°), Secondary (2°), and Tertiary (3°) Carbons...
ChemActivity 10: Oxidation and Reduction 145 Model 7: Primary (1°), Secondary (2°), and Tertiary (3°) Carbons The words methyl (0'), primary (1), secondary (2"), and tertiary (3) were used to describe the number of (nonhydrogen) R groups attached to a carbocation carbon (see CA 8). This same naming strategy is used to describe any carbon with one attached "heteroatom," Z (hetero other). H R Z any atom other than C or H (hetroatom) R- -z -Z н- alkyl (not H)...
ChemActivity 10: Oxidation and Reduction 145 Model 7: Primary (1°), Secondary (2°), and Tertiary (3°) Carbons...
ChemActivity 10: Oxidation and Reduction 145 Model 7: Primary (1°), Secondary (2°), and Tertiary (3°) Carbons The words methyl (0'), primary (1), secondary (2"), and tertiary (3) were used to describe the number of (nonhydrogen) R groups attached to a carbocation carbon (see CA 8). This same naming strategy is used to describe any carbon with one attached "heteroatom," Z (hetero other). H R Z any atom other than C or H (hetroatom) R- -z -Z н- alkyl (not H)...
For the following substitution reactions, choose whether reaction A or B will proceed more quickly. If...
For the following substitution reactions, choose whether reaction A or B will proceed more quickly. If they will proceed at the same rate, put an equal sign,"=", in the box. Reaction Pair Faster? SN1 or SN2? A: CH3Br + CH30-→ CH3OCH3 + Br- B: CH3Br + CH3OH → CH3OCH3 + Br- + H+ Cl + NH3 NH + Cl + H+ B: Ya + Ho — you +C+++11+ OH + Cl + H+ I + NH3 NH2 +I+H+ SN2 ci...
a. Alkenes with electron withdrawing groups are good dienophiles-True/False b. Wolfkishner reaction is helpful to convert an ester to alkane. True false c. Tertiary alcohol will be formed by the r...
a. Alkenes with electron withdrawing groups are good dienophiles-True/False b. Wolfkishner reaction is helpful to convert an ester to alkane. True false c. Tertiary alcohol will be formed by the reaction between a ketone and Grignard reagent True/ false d. A cyclic conjugated compound with 6 pi electron is aromatic- True/ False e. Addition of CO; to Methyl magnesium bromide is a nucleophilic addition Truel false f A good protecting group should be cleaved during the progress of the reaction-True...
Question 1 The following reaction between 2-methylbut-2-ene and hydrogen bromide (HBr) is best described as what...
Question 1 The following reaction between 2-methylbut-2-ene and hydrogen bromide (HBr) is best described as what type of reaction? Refer to the Figure A) Addition B) Substitution C) Elimination D) Rearrangement Question 2 For the reaction in question 1, two products are possible- a major product, and a minor product. For the minor product, what is the splitting pattern for the added hydrogen (highlighted in red) that would be observed in the molecules HINMR spectrum? Refer to the Figure HBr...
4 Which of the fotlowing is the most reactive carhosylie acid derivative A) ester D) anhydride 2 nitrile D) acid chloride E) amide 11) Typically, amides will hydrolyse under A) stronger B) more d...
4 Which of the fotlowing is the most reactive carhosylie acid derivative A) ester D) anhydride 2 nitrile D) acid chloride E) amide 11) Typically, amides will hydrolyse under A) stronger B) more dilute conditions than esters C) milder D) less vigorous E) more saline 12) 1-Methyleyclopentanol is classified as A) a primary aloohol B) a secondary alcohol C) a tertiary alcohol D)a phenol E) an enol 13. For a diene to undergo a Diels-Alder reaction it must: be substituted...
4) (marks-1.5) Please answer the following as TRUE or FALSE in the space provided to the left of each statement (0.5 marks each). True/False a) Tertiary alkyl halides only participate in SN1 reactions. b) CH3O- is a better nucleophile for an SN2 reaction than CH3S-when in methanol. c) Complete hydrogenation of Limonene (drawn below) will produce two stereoisomers.
5) (marks = 3) Please answer the following as TRUE or FALSE in the space provided to the left of each statement (0.5 marks each). True/False All tertiary alkyl halides only participate in SN 1 reactions. CH30 is a better nucleophile for an SN2 reaction than CH3S when in methanol. The relative stability of carbanions is as follows: (most stable) 1° >2 > 30 (least stable) Unlike other alkyl halides (CI, Br, 1), alkyl fluorides do not participate in substitution...
Part 2 Multiple Choice. Select the best answer for each of the questions below: 1. Which of these molecules is not an electrophile? a) CH4 b) CH3+ c) H* d) BF3 2. Which of these molecules is not a nucleophile ? a) NH3 b) OH c) CN d) H* 3. Water behaves as: a) a nucleophile b) an electrophile c) both d) neither 4. The SN2 reaction has how many steps? a) 1 b) 2 c) 3 d) 4 5....
1. In both the sodium iodide
test and the silver nitrate test, why does 2-bromobutane react
faster than 2-chlorobutane?
Bromine is a better leaving group since it is a weaker base than
chlorine is.
2. a. Why does benzyl chloride react under both
SN1 and SN2 conditions?
Benzyl
chloride is a primary alkyl halide, hence reactive under SN2
conditions.
The
primary carbocation formed due to the departure of Cl- is
stabilized by the pi electrons in the benzene ring.
b. Why is...
ChemActivity 10: Oxidation and Reduction 145 Model 7: Primary (1°), Secondary (2°), and Tertiary (3°) Carbons The words methyl (0'), primary (1), secondary (2"), and tertiary (3) were used to describe the number of (nonhydrogen) R groups attached to a carbocation carbon (see CA 8). This same naming strategy is used to describe any carbon with one attached "heteroatom," Z (hetero other). H R Z any atom other than C or H (hetroatom) R- -z -Z н- alkyl (not H)...
ChemActivity 10: Oxidation and Reduction 145 Model 7: Primary (1°), Secondary (2°), and Tertiary (3°) Carbons The words methyl (0'), primary (1), secondary (2"), and tertiary (3) were used to describe the number of (nonhydrogen) R groups attached to a carbocation carbon (see CA 8). This same naming strategy is used to describe any carbon with one attached "heteroatom," Z (hetero other). H R Z any atom other than C or H (hetroatom) R- -z -Z н- alkyl (not H)...
For the following substitution reactions, choose whether reaction A or B will proceed more quickly. If they will proceed at the same rate, put an equal sign,"=", in the box. Reaction Pair Faster? SN1 or SN2? A: CH3Br + CH30-→ CH3OCH3 + Br- B: CH3Br + CH3OH → CH3OCH3 + Br- + H+ Cl + NH3 NH + Cl + H+ B: Ya + Ho — you +C+++11+ OH + Cl + H+ I + NH3 NH2 +I+H+ SN2 ci...
a. Alkenes with electron withdrawing groups are good dienophiles-True/False b. Wolfkishner reaction is helpful to convert an ester to alkane. True false c. Tertiary alcohol will be formed by the reaction between a ketone and Grignard reagent True/ false d. A cyclic conjugated compound with 6 pi electron is aromatic- True/ False e. Addition of CO; to Methyl magnesium bromide is a nucleophilic addition Truel false f A good protecting group should be cleaved during the progress of the reaction-True...
Question 1 The following reaction between 2-methylbut-2-ene and hydrogen bromide (HBr) is best described as what type of reaction? Refer to the Figure A) Addition B) Substitution C) Elimination D) Rearrangement Question 2 For the reaction in question 1, two products are possible- a major product, and a minor product. For the minor product, what is the splitting pattern for the added hydrogen (highlighted in red) that would be observed in the molecules HINMR spectrum? Refer to the Figure HBr...
4 Which of the fotlowing is the most reactive carhosylie acid derivative A) ester D) anhydride 2 nitrile D) acid chloride E) amide 11) Typically, amides will hydrolyse under A) stronger B) more dilute conditions than esters C) milder D) less vigorous E) more saline 12) 1-Methyleyclopentanol is classified as A) a primary aloohol B) a secondary alcohol C) a tertiary alcohol D)a phenol E) an enol 13. For a diene to undergo a Diels-Alder reaction it must: be substituted...
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