Monday, April 23, 2018

organic chemistry - Is the index 1 in the substituent name "1-methylethyl" a redundant index?


I want to identify the correct IUPAC name for this compound:


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I would say this is 2-methyl-5-(methylethyl)-5-(1-methylpropyl)-nonane. However, the solution manual says that it is 2-methyl-5-(1-methylethyl)-5-(1-methylpropyl)-nonane.



I don't understand why the first "1-" index is necessary. It doesn't add any information, as "(2-methylethyl)" would actually be just a propyl.


Am I missing something?




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periodic trends - Comparing radii in lithium, beryllium, magnesium, aluminium and sodium ions

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