Homework Answers
explanation :
nucleophilicity order for halogens : I- > Br- > Cl- > F-
here I- is the good nucleophile is due to large atomic radius . this ion can donate electrons easily to partner . more atomic sized atoms or ions center cannot hold good all electrons so that nucleous can readily donate electrons . so I- strong nucleophile
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Assigned as (Homework O H7.28-Level 2 Which halogen anion is the strongest nucleophile in a polar...
which reagent in each pair would be the more reactive nucleophile in polar aprotic solvent? a...
which reagent in each pair would be the more reactive
nucleophile in polar aprotic solvent?
a pdl apohe dt a) He Nue vs. MeNH vs. ADe keoH V9 J) фом V9 Кзое f)NH3 NH VS. Awchons -Br
please explain!! 3 e) Which solvent is a polar protic solvent? a) ether c) ethanol b)...
please explain!!
3 e) Which solvent is a polar protic solvent? a) ether c) ethanol b) dimethylformamide d) hexane Circle the correct name for the molecule shown below. Br (trans)-3-bromo-4-methyl-4-heptene (E3-bromo-4-methyl-3-heptene (Z)3-bromo-4-methyl-3-heptene (cis)-3-bromo-4-methyl-3-heptene g) Circle the reaction that would have the fastest rate. NaSH DMF SH NaOH OH B DMF NaSH DMF Br SH NaOH Br он DMF h) Circle the strongest nucleophile in methanol (CH,OH) F Br
The 2-pyridone anion is an ambident nucleophile. Due to resonance effects, both the carbon and nitrogen...
The 2-pyridone anion is an ambident nucleophile. Due to resonance effects, both the carbon and nitrogen atoms are nucleophilic. The nitrogen atom is generally more reactive toward electrophiles, but in the presence of Ag the oxygen atom becomes more reactive. (a) Draw the products of these two reactions in acetonitrile (CH3CN, polar aprotic solvent) (0.4 pts) Ag (b) Why is the nitrogen atom generally more reactive toward electrophiles? (0.2 pts) (c) How do you think Ag' is involved in controlling...
Ans: D Topic: Generalities, solvent effects Section: 6.13 Difficulty Level: Easy 50) Consider an Sy2 reaction...
Ans: D Topic: Generalities, solvent effects Section: 6.13 Difficulty Level: Easy 50) Consider an Sy2 reaction of NaSH in a polar aprotic solvent with (CH),CHCH CH2X. What would be the relative order of reactivity for the following X substituents? LX-1 L. XBr III. X CI IV X = F a)I> II>III> IV b) II>1> IV> IIl c) IV > III> II>I d) III>1> II> IV e) None of these choices Topic: Generalities, solvent effects Section: 6.13 Difficulty Level: Easy 51)...
13. Consider the nucleophiles, F, Cl, Br, and I. In a polar, aprotic solvent, which should...
13. Consider the nucleophiles, F, Cl, Br, and I. In a polar, aprotic solvent, which should be most reactive? WHY? (2) 14. Consider the nucleophiles, F', Cl, Br, and I. In a polar, protic solvent, which should be most reactive? WHY? (2)
Oorai Which is the better leaving group in protic solvent? 1. Which is the better leaving group in aprotic solvent?...
Oorai Which is the better leaving group in protic solvent? 1. Which is the better leaving group in aprotic solvent? I or Cl 2. Which is stronger base? I or Cl 3. Which is the stronger nucleophile in protic solvent? I or Cl 4. or CI Which is the stronger nucleophile in aprotic solvent? 5. Which is the stronger nucleophile? HO or H2N 6. 7. Which ion the better leaving group? CH,O or CH3CO2
Oorai Which is the better leaving...
Assigned as Homework O H2.25-Level 2 Which of the following molecules would not have an atom...
Assigned as Homework O H2.25-Level 2 Which of the following molecules would not have an atom that has a 120° bond angle? O A 2-methylpropene O B Ethyl propanoate с 3,3-dimethylheptanal O D 3-bromobutanamide O E 4-hexyne-2-ol Hint For an atom to have a bond angle of 120, it must be sp2 hybridized.
1. Sketeh the energy diagram for a spontaneous second order reaction. Clearly label all axis, the...
1. Sketeh the energy diagram for a spontaneous second order reaction. Clearly label all axis, the rate limiting step, transition state(a), intermediate(s), and enthalpy change. (4pta) Draw the mechanism given the following reaction: 2. (4pta) (3pts) Rank the following in decreasing strength (1-strongest) of the C-halogen bond: 3. 4. Of all halogens we talked about in lecture, which halogen is considered the best leaving group? Explain why (give 2 reasons). (4pts) 5. Rank the following in decreasing nucleophile quality (1-strongest)?...
1. Which of the following takes place faster by an S2 reaction! 2. Rank from strongest...
1. Which of the following takes place faster by an S2 reaction! 2. Rank from strongest nucleophile to weakest nucleophile. A HO B. HO C. HN D. H 3. Which of the following SN2 reactions is fastest? , (o) (a) H3C-CECH Na NaH CHBr (SN2) сH,Br (b) Naci (S2) 4. Which of the following takes place faster by an E2 mechanism? ONa 5. Which is the best leaving group? A. F" B. CI C. HO D. Br E. H
For the chemical reaction answer the following questions: 1. Is the mechanism Sn1 or Sn2? 2....
For the chemical reaction answer the following questions:
1. Is the mechanism Sn1 or Sn2?
2. What kind of substrate reacts in the following reaction? (2 °
, 2 ° allylic , 3 ° )
3. Is the role of the alkyl halide reactant an acid, base,
electrophile, nucleophile , or both a nucleophile and base?
4. Is the role of the reagent KI an acid, base, electrophile,
nucleophile , or both a nucleophile and base?
5. What is the...
which reagent in each pair would be the more reactive
nucleophile in polar aprotic solvent?
a pdl apohe dt a) He Nue vs. MeNH vs. ADe keoH V9 J) фом V9 Кзое f)NH3 NH VS. Awchons -Br
please explain!!
3 e) Which solvent is a polar protic solvent? a) ether c) ethanol b) dimethylformamide d) hexane Circle the correct name for the molecule shown below. Br (trans)-3-bromo-4-methyl-4-heptene (E3-bromo-4-methyl-3-heptene (Z)3-bromo-4-methyl-3-heptene (cis)-3-bromo-4-methyl-3-heptene g) Circle the reaction that would have the fastest rate. NaSH DMF SH NaOH OH B DMF NaSH DMF Br SH NaOH Br он DMF h) Circle the strongest nucleophile in methanol (CH,OH) F Br
The 2-pyridone anion is an ambident nucleophile. Due to resonance effects, both the carbon and nitrogen atoms are nucleophilic. The nitrogen atom is generally more reactive toward electrophiles, but in the presence of Ag the oxygen atom becomes more reactive. (a) Draw the products of these two reactions in acetonitrile (CH3CN, polar aprotic solvent) (0.4 pts) Ag (b) Why is the nitrogen atom generally more reactive toward electrophiles? (0.2 pts) (c) How do you think Ag' is involved in controlling...
Ans: D Topic: Generalities, solvent effects Section: 6.13 Difficulty Level: Easy 50) Consider an Sy2 reaction of NaSH in a polar aprotic solvent with (CH),CHCH CH2X. What would be the relative order of reactivity for the following X substituents? LX-1 L. XBr III. X CI IV X = F a)I> II>III> IV b) II>1> IV> IIl c) IV > III> II>I d) III>1> II> IV e) None of these choices Topic: Generalities, solvent effects Section: 6.13 Difficulty Level: Easy 51)...
13. Consider the nucleophiles, F, Cl, Br, and I. In a polar, aprotic solvent, which should be most reactive? WHY? (2) 14. Consider the nucleophiles, F', Cl, Br, and I. In a polar, protic solvent, which should be most reactive? WHY? (2)
Oorai Which is the better leaving group in protic solvent? 1. Which is the better leaving group in aprotic solvent? I or Cl 2. Which is stronger base? I or Cl 3. Which is the stronger nucleophile in protic solvent? I or Cl 4. or CI Which is the stronger nucleophile in aprotic solvent? 5. Which is the stronger nucleophile? HO or H2N 6. 7. Which ion the better leaving group? CH,O or CH3CO2
Oorai Which is the better leaving...
Assigned as Homework O H2.25-Level 2 Which of the following molecules would not have an atom that has a 120° bond angle? O A 2-methylpropene O B Ethyl propanoate с 3,3-dimethylheptanal O D 3-bromobutanamide O E 4-hexyne-2-ol Hint For an atom to have a bond angle of 120, it must be sp2 hybridized.
1. Sketeh the energy diagram for a spontaneous second order reaction. Clearly label all axis, the rate limiting step, transition state(a), intermediate(s), and enthalpy change. (4pta) Draw the mechanism given the following reaction: 2. (4pta) (3pts) Rank the following in decreasing strength (1-strongest) of the C-halogen bond: 3. 4. Of all halogens we talked about in lecture, which halogen is considered the best leaving group? Explain why (give 2 reasons). (4pts) 5. Rank the following in decreasing nucleophile quality (1-strongest)?...
1. Which of the following takes place faster by an S2 reaction! 2. Rank from strongest nucleophile to weakest nucleophile. A HO B. HO C. HN D. H 3. Which of the following SN2 reactions is fastest? , (o) (a) H3C-CECH Na NaH CHBr (SN2) сH,Br (b) Naci (S2) 4. Which of the following takes place faster by an E2 mechanism? ONa 5. Which is the best leaving group? A. F" B. CI C. HO D. Br E. H
For the chemical reaction answer the following questions:
1. Is the mechanism Sn1 or Sn2?
2. What kind of substrate reacts in the following reaction? (2 °
, 2 ° allylic , 3 ° )
3. Is the role of the alkyl halide reactant an acid, base,
electrophile, nucleophile , or both a nucleophile and base?
4. Is the role of the reagent KI an acid, base, electrophile,
nucleophile , or both a nucleophile and base?
5. What is the...
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