Branched alkyl groups, nomenclature

Conventional chemical nomenclature recognises the longest chain of carbon atoms that is terminally substituted. Alkyl groups also attached to this substituted terminal atom are named as substituents. In practice, the conventional approach treats any alkyl substituent to an otherwise substituted alkyl group as a branch unless it occurs at the opposite terminus of the carbon chain in question. Non-carbon substituents are treated the same way as alkyl substituents. 

Methylethyl is the systematic name for this group isopropyl is a common name. Systematic nomenclature for alkyl groups is similar to that for branched-chain alkanes, with the provision that numbering always begins at the point where the group is attached to the main chain. There are four C4 groups. 

Applying the lUPAC Rules The Names of the CjH,4 Isomers 69 What s in a Name Organic Nomenclature 70 Alkyl Groups 72 lUPAC Names of Highly Branched Alkanes 73... 

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