Alkene: Difference between revisions

Revision as of 20:37, 19 February 2005

Revision as of 23:10, 13 March 2005

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#Name branched or substituted alkenes in a manner similar to [[alkane]]s.

#Number the carbon atoms, locate and name substituent groups, locate the double bond, and name the main chain

<table{| align="center" cellspacing="10" cellpadding="10">

<tr|- align="bottom">

|

<td>

<tt>

CH₃CH₂CH₂CH₂CH==CH₂</br>

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</tt></br>

<center>'''1-Hexene'''</center>

|

</td>

<td>

<tt>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CH₃</br>

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</tt></br>

<center>'''4-Methyl-1-hexene'''</center>

|

</td>

<td>

<tt>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CH₃</br>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CH₂CH₃</tt></br>

<center>'''2-Ethyl-4-methyl-1-hexene'''</center>

|}

</td>

</tr>

</table>

=== Common Names ===

Despite the precision and universal acceptance of the IUPAC naming system, some alkenes are known almost exclusively by their common names:

<table{| cellspacing="5" cellpadding="2">

|-

<table cellspacing="5" cellpadding="2">

| || CH<tdsub>2</sub>="CH₃₂C(" || CH₃)CH="CH₂</td>"

<tr>

| CH<tdsub>3</sub>C(CH₃CH)="CH₂</td>"

<td></td>

|-

<td>CH₂=CH₂</td>

<td| align="right"> | '''IUPAC name:'''</td> || Ethene

<td>CH₃CH=CH₂</td>

| Propene || <td>2-Methylpropene</td>

<td>CH₃C(CH₃)=CH₂</td>

|-

</tr>

<td| align="right"> | '''Common name:'''</td> || Ethylene

<tr>

| Propylene || Isobutylene

<td align="right">'''IUPAC name:'''</td>

|}

<td>Ethene</td>

<td>Propene</td>

<td>2-Methylpropene</td>

</tr>

<tr>

<td align="right">'''Common name:'''</td>

<td>Ethylene</td>

<td>Propylene</td>

<td>Isobutylene</td>

</tr>

</table>

==See also:==