Question

What alkyl halide would give only the following alkenes on dehydrohalogenation with sodium ethoxide a) 1-pentene c) 2-methyl-1-butene

Answer 1

The Dehyosohalogenation ot alye hali ives alkene In this reoti on 1oss yen and halogen or haljde trom two adjalent Carbon atom talcer place to get allkene This is also called as 8-elimination becauee hyaogen atem m B-cavocn Bets eliminatel This reactian proccead in pretenca stan synturer 1-pentene base ie s0aium ethoxde 1-Biomopentane is trealed cwite, sod etoxide to t 1-pentene omy when HE 1 4 ST 1 Et BY 1- pentene Nat 1- Bromopentane - Nass Alavttyan f- Hydgen atpm by bare Sod ethoxide nd remolau to tm ona 1-rentone bromide is demed No 0thhes Produrt

2-Methil-1-buene (2 when 1-Bromo-2-methye lautene is +seated ath soe etthoxide it unde Soee dehyorkromina tien t0 tom -Methyl- 1- butene onit BY. 3 1-Bromo-Mee Lutone s Nao타 HF -NaBr -to Mey-1- Loutene
in case of synthesis of 1- pentene ,.

1-Bromopentane alkyl halide should be used with sodium ethoxide

And for 2-Methyl-1-butene we should use 1-Bromo-2-methylbutane as alkyl halide.