13. A thermodynamically controlled reaction will yield predominantly a. the most

Question

13. A thermodynamically controlled reaction will yield predominantly a. the most stable product b. the product whose formation requires the smallest free energy of activation c. the product that can be formed in the fewest steps d. the product that is formed at the fastest rate 14. What is the major organic product obtained from the following reaction? ring-closing alkene metathesis a. b. 2 c. 3 d. 4 15. Which reagent would accomplish this conversion? a. Os04, NaHSO b. KMnO d. PCC 16. Which chloride would react the fastest in an SN2 reaction? CHy CH2C Cl CH3)2 a. b. 2 c. 3 d. 4 17. Which of the protons in the following molecule appear furthest upfield in the 'H NMR spectrum? 4 b. 2 c. 3 d. 4 a.

Explanation / Answer

13.a)the most stable product. Because thermodynamic product always in lower energy than kinetic product so it is more stable.

14. a) is the right product. Any ring closing metathesis reaction like Grubbs catalyst gives this product.

15. d)PCC. It will oxidize only primary alcohol to aldehyde without interfering double bond.

16. b)2 is going very faster SN2 reation because of less bulky group at -CH2Cl.

17. a)1. will be more upfield because of far away from electron withdrawing carbonyl group.

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