Question

Which of the following reactions does not match correctly with its name?

• A. R–CO–NH2 + Br2 + 4KOH (aq) → : Hofmann degradation
• B. R–NH2 + 3R–X → : Hofmann exhaustive alkylation
• C. R–CO–NH2 + 4[H] → (LiAlH4) : Mendius reduction
• D. R–CH2– N+– (R) 3X – → ((i) moist Ag2O, (ii) △, -H2 O) : Hofmann elimination

Answer 1

Answer: (C)

R–CO–NH2 + 4[H] → (LiAlH4) : Mendius reduction

Answer 2

The Mendius reduction is not a recognized or commonly used name for any specific reaction. It appears to be a misnomer or a misspelling. The correct name for the reaction described in option (C) is Clemmensen reduction, not Mendius reduction. The Clemmensen reduction involves the reduction of a carbonyl group (such as R–CO–NH2) to an alkane using zinc amalgam (Zn[Hg]) and concentrated hydrochloric acid (HCl), rather than LiAlH4.
Therefore the reaction that does not match correctly with its name is option (C): R–CO–NH2 + 4[H] → (LiAlH4) : Mendius reduction.