Question

Please help. Will give medal!!!
Name this molecule.
CH_2-CH_2-CH_3
|
CH_3-CH_2-C=CH_2

Answer 1

Please someone help...

Answer 2

Select the longest chain which includes the doube bond

Answer 3

double*

Answer 4

Lets name this as we usually do with alkenes (text obtained from wiki):
1) Number the longest carbon chain that contains the double bond in the direction that gives the carbon atoms of the double bond the lowest possible numbers:

This gives us butene (butane is 5 carbon when saturated).

2) Indicate the location of the double bond by the location of its first carbon:
The double bond is on the first carbon according to the numeration so we make the name 1-butene

3) Name branched or substituted alkenes in a manner similar to alkanes:
From the drawing we have a branching on carbon number 2 and the branching is 2 carbon long. The alkane name for that is ethane, when side groups we use "yl" thereby we get the name:
2-ethyl-1-pentene.

Answer 5

Sorry I have written butene and butane please change it to "pentene" and "pentane"