# Need Help NAmimg-Organic Chemistry

i really dont know where to start on this one. I know the main chain is nonane. The branch looks like isopropyl with a methy on it. However i dont think thats the right answer. All help is greatly apreciated!!!!
http://img125.imageshack.us/img125/1273/chemsk0.png [Broken]

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## Answers and Replies

Have you learned how to name complex branches (sub-branching)? The carbon attached to the chain is by definition, atom 1, for the branch. Then you name the branch like it's a compound, but then change the -ane to -yl. Put the whole thing in parentheses, and now it's a substituent.

I would guess 5-1,2 MethylPropa-nonane, but im not sure

I know the branch is 1,2-MethylPropane.

I would write it as follows:
$$CH_3(CH_2)_3C(R)(CH_2)_3CH_3$$

5-R-Nonane. ( i think there is an alternative name, but ive definatley used Nonane before.

$$R=CH_3(CH)_2(CH_3)_2$$

1,2-Methyl-Propane

So combining the two, 5-1,2-MethylPropa-nonane, is my best guess :s

EDIT: THat should be 1,2-DimethylPropane branch, making it 4-1,2-DiMethylPropyl-nonane

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well i guess the answer would be 4 -(2,3 di methyl) butyl nonane

apparently the above answers arent corect. ANyone else klnow if that chain is some special group with its own name?

no that branched group does not have a 'common' name - you would use normal IUPAC nomenclature
5-(1,2 dimethyl)propyl - nonane

It is 5-1,2-DiMethylPropyl-Nonane:

Top of page 75: http://www.iupac.org/publications/books/principles/principles_of_nomenclature.pdf#search=%224-1%2C2-dimethylpropyl-nonane%22 [Broken]

You can prob just type the empirical formula into a chemical catalogue and slect the one you want.

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