The first one has 7 carbons as the longest chain. When parentheses confuse you just draw the stucture out on a piece of paper and you can easily find the longest chain. There is a double bond at carbon 2 so it is a 2-heptene and a butyl group on carbon 3 and methyl group on carbon 2.I would name it as
3-butyl-2-methyl-2-heptene.
The second one is a diene since it has two double bonds at carbon 2 and carbon 7 so it is a 2,7-nonadiene. It has two methyl groups at carbon 2 and 8 so I would name it as
2,8-dimethyl-2,7-nonadiene. The longest chain conaining the two double bonds is 9.
You would do well to google nomenclature of organic compounds or put the formula of either (or both) into google and see how it's done. I'm not an organic chemistry but this is how I would name them. I tried to give you a link but the board won't let me do that. Check my work, especially the numbers I used.
I need help naming these structures.. I get very confused when there are parentheses with a subscript so can I get an explanation on how to interpret them? Anything helps!
1. (CH3CH2CH2CH2)2C=CHCH3
2. (CH3)2C=CHCH2CH2CH2CH=C(CH3)2
2 answers
Thanks for your response and writing it out definitely helped a lot.
Would counting the number of C atoms present in the structure give the name of the structure (butane, pentane, etc.) or am I missing something?
Would counting the number of C atoms present in the structure give the name of the structure (butane, pentane, etc.) or am I missing something?