E) 1. Raney nickel 2. H3C-MgBr 3. H20/H30+ 26) The acidity of a thiol A) phenol
ID: 1084964 • Letter: E
Question
E) 1. Raney nickel 2. H3C-MgBr 3. H20/H30+ 26) The acidity of a thiol A) phenol B) ethanol C) acetic acid D) ammonia proton most closely resembles which of the following acids? 27) An azeotrope is: Equimolar mixture of ethanol and water Constant boiling Mixture C) Alcohol produced by fermentation D) Mixture of two different alcohols E) A eutectic mixture 28) Which of the following functional groups cannot be present in the alkyl halide portion of agrignard reagent? A) OH B)Nitro C) Carbonyl D) All of the above E) A and B 29) Reaction of an ester with a Grignard Reagent will produce which class of alcohol A) Primary B) Secondary C) Tertiary D) Quaternary E) No Reaction.Explanation / Answer
26) c) Acetic acid
Thiol proton in thiophenol has Pka value 6.62 in water, whereas acetic acid has 4.75. (ethanol 15.9, ammonia 38). Hence the answer is acetic acid
27) b) constant boiling mixture
Azeotrope is mixture of two liquids
28) d) All the above
A Grignard reagent can react with OH, Nitro, and carbonyl groups. Hence these groups should not be present in a alkyl halide portion of Grignard reagent
29) c) Tertiary
An ester functionality on reaction with the first equivalent of Grignard reagent gives a ketone functionality. Ketone is more reactive than ester hence ketone will react with the second equivalent of Grignard reagent to give tertiary alcohol as the final product.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.