How Do You Name a Nonane with an Isopropyl and Methyl Branch?

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Discussion Overview

The discussion revolves around the naming of a nonane compound that has both isopropyl and methyl branches. Participants explore the correct IUPAC nomenclature for this compound, considering various branching structures and their implications for naming.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant expresses uncertainty about how to start naming the compound, identifying the main chain as nonane and suggesting the branch resembles isopropyl with a methyl group.
  • Another participant explains the process of naming complex branches, emphasizing the importance of identifying the carbon attached to the main chain as atom 1 for the branch.
  • A different participant proposes the name 5-1,2-MethylPropa-nonane, suggesting that the branch is 1,2-MethylPropane, but later revises this to 4-1,2-DiMethylPropyl-nonane.
  • Another participant suggests an alternative name of 4-(2,3-di-methyl)butyl-nonane.
  • One participant notes that previous answers may not be correct and questions if the branched group has a specific common name.
  • A later reply clarifies that the branched group does not have a common name and that normal IUPAC nomenclature should be used, suggesting 5-(1,2-dimethyl)propyl-nonane.
  • Another participant confirms the name 5-1,2-DiMethylPropyl-Nonane and references a source for further verification.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the correct naming of the compound, with multiple competing views and proposed names remaining throughout the discussion.

Contextual Notes

There are limitations in the discussion regarding the assumptions made about the structure of the branches and the application of IUPAC rules, which are not fully resolved.

skull
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i really don't 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 don't think that's the right answer. All help is greatly apreciated!
http://img125.imageshack.us/img125/1273/chemsk0.png
 
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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 I am 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 I've 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

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