MECHANISMS (8 pts.) 4. Choose two of the following: a. Write a complete, detailed mechanism for the...

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MECHANISMS (8 pts.) 4. Choose two of the following: a. Write a complete, detailed mechanism for the following reaction: :0:  CH3OH, H+  b. When dissolved in water, trichloroacetaldehyde (chloral) exists primarily as chloral hydrate ("knockout drops"), a geminal diol. Show the structure of the product and write the mechanism for the formation of chloral hydrate from chloral.  Cl :0: I II Cl—C—C—H  Cl  H20  c. Ketones react with dimethylsulfonium methylide to yield epoxides.  0  :- CH2S(CH3)2 dimethylsulfonium methylide  DMS(;  Suggest a mechanism for the reaction.    • (CH3)2S  d. When cyclohexanone is heated in the presence of a large amount of acetone cyanohydrins and a small amount of base, cyclohexanone cyanohydrin and acetone are formed. Suggest a mechanism.    H „ C  CH;  OHS  HO —  0 I ,C, H,C" `C H3

David · Accepted Answer

Regarding 5(b), please go through the follwing references: 
1.Organic reactions by Michale B. Smith, Chapter 8, page 785 (Phosphorus Ylids - WittigReagents) 
2.Advanced Organic Chemistry (Fourth Ed.),  PartB: Reactions & Synthesis, by Francis A. Carey and R.J. 
Sundberg, Chapter 2, page 116.
Regarding  5(c),

MECHANISMS (8 pts.) 4. Choose two of the following: a. Write a complete, detailed mechanism for the following reaction: :0: CH3OH, H+ b. When dissolved in water, trichloroacetaldehyde (chloral) exists...

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