1. Which of the following bases can deprotonate a terminal alkyne completely (K

Question

1. Which of the following bases can deprotonate a terminal alkyne completely (K > 105)? a. NaH b. KOH c. H20 e. KOPh 2. Which of the following sets of reagents can be applied to accomplish the transformation shown? ?? HO a. 1.mGPBA; 2. NaOH b. Os04, KHSO5 c. KMn04, Na0H, 0 °C d. 1. 03; 2. Zn, AcQH e. H202, NaoH 3. Treatment of the alkyne below with 1 equivalent of Br2 followed by 1 equivalent of Cl2 gave product(s) with the formula C4HeBr2Cl2. Which of the following best describes this product? 1. Br2 2. Cl2 a. Asingle enantiomer b. A mixture of two enantiomers c. A mixture of two diastereemers d. A mixture of four diastereemers e. A mixture of constitutional isomers

Explanation / Answer

1.

(a) NaH can deprotonate a terminal alkyne.

2.

(c) KMnO4, NaOH, 00C

3.

(a) A single enantiomer will form.

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