Chapter NW1, Problem 1E

Interpretation Introduction

Interpretation: The reason behind below molecule to be named as methylpropene instead of $\text{2-methyl-1-propene}$ should be explained.

  

Concept introduction: IUPAC conventions say in order to name the alkyl groups attached at the branched positions in alkanes, longest chain is numbered so as to provide least digit to the carbons near the branch. This is also true for olefin system. In other words, olefin carbon is numbered from side that gives least numeral to all other substituents as well.