Organic Chemistry, Form, Part 10 - Nomenclature for Higher Molecular Weight Alkenes

Greetings,

This post extends "Organic Chemistry, Form, Part 9" to more challenging possibilities.  This more challenging problem requires a new designation; E for "opposite sides" and Z for "same side".  The 'E' and 'Z' labels are German for 'Entgegen' and 'Zusammen'.

The steps now are:

1) Identify the longest carbon chain and number the carbons beginning at the end closest to the double bond.
2) Note the carbon numbers for which the double bond begins and for any alkyl "branches".
3) The longest chain will appear as two alkyl groups left and right of the double bond - Note the relative positions of the groups (adjacent or diagonal-opposite).
4) The name begins with (E)- or (Z)- depending on your observation in "3)".
5) Numbers indicate the positions of any alkyl branch groups and the double bond location.  Two or more alkyl groups are listed in alphabetical order in the name.

The following chart provides an example.

Lewis structural formulas are named similarly.  The prefix, "Undec-", represents the number, 11.

That's all for this post.  As always, thank you for reading!


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