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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: IBM on January 13, 2020, 01:58:19 AM

Title: IUPAC NAME
Post by: IBM on January 13, 2020, 01:58:19 AM

How to do the numbering of the compound below?

Title: Re: IUPAC NAME
Post by: chenbeier on January 13, 2020, 07:00:37 AM

Check the order of substituents. Alphabethic order. Smaller numbers.

Title: Re: IUPAC NAME
Post by: hollytara on January 13, 2020, 10:53:37 AM

all alkyl substituents so the rule is "lower number at first point of difference"  - start with one substituent as #1, then the lowest second number.

list them alphabetically (but prefixes like "iso" don't count for alphabetizing)

Title: Re: IUPAC NAME
Post by: chenbeier on January 13, 2020, 12:12:26 PM

I would not use ISO. Better is 1-Methyl- ethyl- instead Isopropyl-

Title: Re: IUPAC NAME
Post by: gedftsnd on January 20, 2020, 09:14:23 AM

highest substituent priority gets lowest number.