Hexa-3, 5-dien-1-yne
Hexa-1, 3-dien-5-yne
Hex-1, 3-dien-5-yne
Hex-1-yne-3,5-diene
For equal positions C = C is preferred
HC61≡C25−C34H=C43H−C52H=C61H2correctincorrect
For two C = C groups hexa is used in place of her. The name is alphabetically.