Alkynes undergo hydroboration to give alkylboranes, which can be oxidized to give carbonyl compounds with hydrogen peroxide. The net result of the two-step sequence is hydration, which gives aldehydes from terminal alkynes. In these reactions, the alkyne is oxidized to form an enol, which then tautomerizes to a carbonyl. Draw the structure of the enol formed in the conversion of 1-decyne to deconal.