Chemistry
posted by Shadow .
Name the compounds
CH3CH2CHCH2CH3
 Is this 3Pentane? Thanks

3Pentene **

CH3CH2CH2CH2CH3 is npentane.
CH3CH2CHCHCH3 is 2pentene. You have a pentavalent C on C #2 from the right end. Counting from the left it is 3pentene but counting from the right it is 2pentene. Which end do you start counting? The one that gives the smaller numbers.