Outline efficient syntheses of each of the following alkynes from acetylene and any necessary organic or inorganic reagents:
(a) 1-Heptyne
(b) 2-Heptyne
(c) 3-Heptyne
Sample Solution (a) An examination of the structural formula of 1-heptyne reveals it to have a pentyl group attached to an acetylene unit. Alkylation of acetylene, by way of its anion, with a pentyl halide is a suitable synthetic route to 1-heptyne.
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