Which of the following choices is the correct mechanism for the Williamson ether

Question

Which of the following choices is the correct mechanism for the Williamson ether synthesis of ethyl isopropyl ether? 28. A) B) C) Na" :H D) E) 29. Which of the following statements about alkenes is true? a) The C-C bond is comprised of one ? bond and one bond. B) Each carbon atom of the C-C bond is sp-hybridized d) The shape about each carbon atom of the C-? bond is linear. D) The bond angle about each carbon atom of the C-C bond is 109.5 E) Free rotation is possible about the C-C bond. 30. What combination of rings and/or multiple bonds cannot occur in a compound with the molecular formula, CoHoN? Hint, calculate degrees of unsaturation A) 3 double bonds B) I double bond&1 triple bond C) 2 rings & 1 double bond D) I ring, I double bond & 1 triple bond E) I ring &2 double bonds

Explanation / Answer

28) option C is the correct mechanism.

Explanation: The hydride ion abstracts acidic proton from -OH and produces oxygen anion which on further reaction with alkyl halide produces ether as product.

29) The C=C bond is comprised of one sigma bond and one pi bond. option A is correct

Explanation: The carbon atoms of C=C are sp2 hybridized not sp hybridized. so option B is not true.

Th shape about each carbon atom of the C=C bond is planar not linear. so option C is not true.

The bond angle is 120° not 109.5° so option D is not true.

30) option D the answer.

Explanation: degree of unsaturation = [2+2(C)-H+N] / 2

= [2+2(6)-9+1]/2

= 6/2 = 3

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