Show how you would accomplish the following synthetic transformations. Show all intermediates.

Show how you would accomplish the following synthetic transformations. Show all intermediates.

(a) 2,2-dibromobutane → but-1-yne

(b) 2,2-dibromobutane → but-2-yne

(c) but-1-yne → oct-3-yne

(d) trans-hex-2-ene → hex-2-yne

(e) 2,2-dibromohexane → hex-1-yne

(f) cyclodecyne → cis-cyclodecene

(g) cyclodecyne → trans-cyclodecene

(h) hex-1-yne → hexan-2-one, CH₃COCH₂CH₂CH₂CH₃

(i) hex-1-yne → hexanal, CH₃(CH₂)₄CHO

(j) trans-hex-2-ene → cis-hex-2-ene