2423Chapt2

2423Chapt2 - 3 O Na + H 2 (b) CH 3 O CH 3 + BH 3 H 3 C - O...

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CHAPTER 2- Practice Exercises (ORGANIC CHEM I )________DR. PAHLAVAN 1. Ephedrine- commonly used as a stimulant, appetite suppressant, concentration aid, decongestant, and to treat hypotension associated with anaesthesia. Calculate the formal charge of the indicated atoms. O NH H 3 N O O O O b a c e d f 1. Using partial charges ( δ + / δ - ), indicate the polarity ( ) of the polar covalent bonds in the following: O O F F F C = C Cl H Cl (a) (b) (c) (d) H 2. Which of the following pairs represent resonance structures? (a) and (b) CH 3 - CH = CH - CH 3 and H 2 C = CH - CH 2 - CH 3 (c) CH 3 - C - CH 2 O and CH 3 - C = CH 2 :O: .. (d) N - N N and N = N = N .. H 3 C - N = N = N : : and H 3 C - N - N N : (e) : 3. Draw all possible resonance structures for the species below: (b) CH 3 - C - CH = CH CH 2 :O: .. (c) (a) O : : (d) 5. (I) Circle all the Lewis bases and box all the Lewis acids in the group of compound below: : CH 3 I BCl 3 FeBr 3 H 3 O N .. NH 3 CH 3 OH Br + (II) Label the acid and the base in each reaction below: (a) CH 3 OH + NaH CH
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Unformatted text preview: 3 O Na + H 2 (b) CH 3 O CH 3 + BH 3 H 3 C - O - CH 3 BH 3 .. 1 6. Write a conjugate acid and a conjugate pairs for each of the followings. a) H 2 O b) NH 3 c) HS-d) CH 3 OH d) HSO 4-e) H 2 PO 4-f) HC 2-7. a) Given that pK a for phenol is 9.95 and pK a for ammonium ion is 9.25. Will the following reaction occur? Will the reactant or the product be favored at equilibrium? OH + NH 3 ? O + NH 4 phenoxide ion b) Given the following reaction, indicate acid and base on both sides of the equilibrium. . Also indicated on which side the equilibrium would lie. N : C - H + N N : C : N + H pKa = 9.1 pKa = 5.2 9. Determine the number of hydrogen bonded to the indicated atoms using the following skeletal structures shown below, which is the molecular formula for cocaine. O NH H 3 N O O O O b a c e d f g 10. Convert the following structures into molecularformulas. 2...
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This note was uploaded on 09/24/2011 for the course CHEM 1411-12 taught by Professor Pahlavan during the Spring '10 term at HCCS.

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2423Chapt2 - 3 O Na + H 2 (b) CH 3 O CH 3 + BH 3 H 3 C - O...

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