The Alkynes and Aromatic Hydrocarbons (Leaving Cert Chemistry): Flashcards

$C_nH_{2n-2}$

Ethyne, $C_2H_2$

Linear

1 sigma bond and 2 pi bonds

180°

Exceeding 3000°C

$2C_2H_2 + 5O_2 \rightarrow 4CO_2 + 2H_2O$

Compounds containing a benzene ring structure

$C_6H_6$

Michael Faraday in 1825

120°

6 delocalised electrons

150 kJ/mol

Methylbenzene (toluene)

Substitution (not addition)