Homework answers / question archive / University of Texas, Dallas - CHEM 2211 HW Questions PART I 1)The abbreviation NAS stands for……………   Meisenheimer Complex is formed addition-…………

University of Texas, Dallas - CHEM 2211 HW Questions PART I 1)The abbreviation NAS stands for……………   Meisenheimer Complex is formed addition-…………

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University of Texas, Dallas - CHEM 2211

HW Questions

PART I

1)The abbreviation NAS stands for……………

 

2. Meisenheimer Complex is formed addition-………….mechanism of ………... reaction.

 

3. Benzyne is formed in …………. aromatic substitution reaction.

 

4. The state of hybridization of the triple bonded carbons in benzyne is…………….

 

5. Phenylation to 1,3-diketo compounds is an example of ……………………reaction.

 

6. In ethylene the carbons are…………..hybridized.

 

7. Bromination of cis-2-butene produces a racemic mixture whereas trans-2-butene produces a meso compound — why?

 

 

 

8. Write the stability order of 1-butene, cis-2-butene and trans-2-butene.

 

9. What is Markovnikov’s rule? 

 

10. What is Anti-Markovnikov’s condition? Give an example.

 

11. In the case of hydrohalogenation reaction………………..…..and ………………….…. addition occur.

 

15. What do you mean by vicinal and germinal dihalides? Give example in both cases.

 

16. What do you mean by halohydrin? How does it form?

 

17. What is NBS? Which purpose it serves in organic synthesis?

 

18. Hydroboration-Oxidation is an anti………………addition to alkenes.

 

19. What is 9-BBN? Mention its use in organic synthesis.

 

20. Mercurinium ion is formed in………………reaction.

 

21. Oxymercuration-Demercuration is a ……………….hydration procedure.

 

22. What is degree of unsaturation? Explain the degree of unsaturation considering C₆H₁₀ as an example.

Degree of unsaturation is the number of pi bonds and/or rings in the molecule. Alkenes are unsaturated hydrocarbons because they have fewer hydrogens than alkenes with the same number of carbons.

 

23. Hydrogenation is a ……………addition.

 

24. Peroxyacetic acid is used in ………………reaction of alkenes.