Toluene is reduced by Na in liquid $NH X_{3}$ with ethanol to the major Birch product. How many $s p^{3}$ hybridised carbon atoms (ring plus substituent) does this product contain?

Answer: C

The methyl group is electron-donating and remains on a double-bond carbon, giving 1-methylcyclohexa-1,4-diene. Its ring has two sp3 CH2 carbons (C-3 and C-6) and the methyl carbon is also sp3. The total is 3.

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Toluene is reduced by Na in liquid NHX3​ with ethanol to the major Birch product. How many sp3 hybridised carbon atoms (ring plus substituent) does this product contain?

Answer: C

More questions on Dissolving metal reductions (Birch, Na/NH3)

Toluene is reduced by Na in liquid $NH X_{3}$ with ethanol to the major Birch product. How many $s p^{3}$ hybridised carbon atoms (ring plus substituent) does this product contain?