Organic Chemistry

Common system

For alphabetization purposes,iso-andneo-are considered part of the name, and alpha-
betized.Sec-andtert-are not considered an alphabetizable part of the name.

(In the following images, theR-represents any carbon structure.)

18.9.1 Iso-

Iso-can be used for substituents that branch at the second-to-last carbon and end with
two methyls. An isobutyl has four carbons total:

Figure 50

Isobutyl