[Evaldas]

How to name a hydrocarbon by IUPAC nomenclature that has a double and a triple bond?

[Evaldas]

And I mean a carbon-hydrogen compound that contains both a double and a triple bond.

[igloo5080]

I presume that you simply use yne and ene together with appropriate numbering.

So, for example, CH₃CCCHCH₂ (sorry, I don't know how to include the bonds) would be pent-3-yn(e)-1-ene or perhaps pent-1-en(e)-3-yne.

This is how we do it in Europe, but maybe elsewhere names such as 1-penten-3-yne are preferred

This is what I would surmise is the correct way to name, but I do not know for certain. Perhaps other correspondents can help.

[Jzalkm]

i usually use this software to cross-check the IUPAC naming: http://www.acdlabs.com/resources/freeware/chemsketch/