Question

help with one chemistry question? naming a hydrocarbon?

i've asked around with a friend and searched the web but i can't find anything to help me answer this question that i understand.

http://prntscr.com/axnuil

Answer 1

First identify the functional group present, then determine starting point on which carbon would give you the lowest number.



For example, this is 2-pentene (can also be written as pent-2-ene)

pent indicates 5 carbon atoms.

-ene indicating that there is a double bond and the 2 indicating on which carbon it is on.

Notice it's not 3-pentene, because 2-pentene gives you the lower number.