Answer:
Acetylide,Enol, Aldehyde, Tautomers,Alkynes,Hydroboration,Keto.
Explanation:
<u>Acetylide</u> anions are strong nucleophiles that open epoxide rings by an SN2 mechanism.
<u>Enol </u>tautomers have an O-H group bonded to a C=C.
<u>Aldehyde</u> are formed from terminal alkynes with the addition of water using BH3 then H2O2.
<u>Tautomers</u> are constitutional isomers that differ in the location of a double bond and a hydrogen and exist in an equilibrium with each other.
<u>Alkynes</u> are compounds that contain a carbon-carbon triple bond.
<u>Hydroboration</u> of a terminal alkyne adds BH₂ to the less substituted, terminal carbon.
<u>Keto</u> tautomers have a C=O and an additional C-H bond.