Question

Give the IUPAC name for the following.
$H_{3}C-\stackrel{\stackrel{H}{|}}{C}=\stackrel{\stackrel{H}{|}}{C}-C{H}_3$.

Answer 1

Rules for Naming Hydrocarbons:-

Rule-I Selection of the longest carbon chain.

Rule-II Numbering the longest chain: Longest chain is numbered starting from a terminal carbon. Numbering is done is such a way that lowest possible number is given to the side cahin or a functional group.

Rule-III Writing names of branched, saturated hydrocarbons, locants are written first in alphabetical order followed by name of parent chain.

Rule-IV Some common names are retained in $IUPAC$ system for unsubstituted hydrocarbon only.

$But-2-ene$ or $2-Butene$

For double bond we use $ene$ as a suffix and for four carbon atoms we use $but$ as word root.