<unk>  (systematic name: ethyne) is a hydrocarbon belonging to the group of alkynes. It is considered to be the simplest of all alkynes as it consists of two hydrogen atoms and two carbon atoms.<unk>  is an unsaturated organic compound because its four atoms are triple bonded through a covalent bond.
The carbon-carbon triple bond leaves the carbon atoms with two sp hybrid orbitals for sigma bonding, placing all four atoms in the same straight line, with CCH bond angles of 180°.<unk>  was discovered in 1836 by Edmund Davy who identified it as a "new carburet of hydrogen." It was rediscovered in 1860 by French chemist Marcellin Berthelot, who coined the name<unk> ." The Nobel Laureate Gustaf Dalén was blinded by an<unk>  explosion.
Acetylene
Benzene
Ether
Acrolein
Vinyl chloride
Xylene
Methane
Cyclohexane