2-Bromo-2,3-dimethylbutane is heated with alcoholic $KOH$ . The Saytzeff (major) alkene is

A2,3-dimethylbutan-2-ol
B2,3-dimethylbut-1-ene
C2,3-dimethylbut-2-ene
D3,3-dimethylbut-1-ene

Answer: C

Beta hydrogens are on the methyl groups at C-2 and on C-3. Removal from C-3 gives the tetrasubstituted alkene

(CH X_{3}) X_{2} C = C (CH X_{3}) X_{2}

, the most stable one, which is the Saytzeff product. 3,3-Dimethylbut-1-ene would need a skeletal rearrangement and 2,3-dimethylbutan-2-ol is a substitution product.

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2-Bromo-2,3-dimethylbutane is heated with alcoholic KOH. The Saytzeff (major) alkene is

Answer: C

More questions on Saytzeff vs Hofmann products

2-Bromo-2,3-dimethylbutane is heated with alcoholic $KOH$ . The Saytzeff (major) alkene is