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Which one of the following reactions will not form acetaldehyde? (1) CH3CH2OH —Cu, 573 K→ (2) CH3CN —(i) DIBAL-H (ii) H2O→ (3) CH2=CH2 + O2 —Pd(II)/Cu(II)→ H2O (4) CH3CH2OH —CrO3/H2SO4→

1. (1)
2. (2)
3. (3)
4. (4)

Correct answer: (1)

Solution

The reaction of ethanol with copper at high temperatures primarily leads to the formation of ethylene and other products rather than acetaldehyde, making it the correct option that does not yield acetaldehyde.

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