E/Z isomers.

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https://www.youtube.com/watch?v=nx_Il1uFpKc

Last updated 3:23 PM on 6/21/26
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Why is E/Z isomerism superior

We can name isomers with more than 2 different groups.

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<p>How do we name E/Z isomers using CIP priority rules</p>

How do we name E/Z isomers using CIP priority rules

First we look at the atoms attached to the carbons on either side of the double bond.

The element with greatest atomic number is given higher priority.

On left hand side, we have chlorine(17) and bromine(35) atom, so on left side bromine has higher priority

On right hand side hydrogen (1) and F(9), so fluorine has higher priority.

On left hand isomer, higher priority groups are on opposite sides, so its the E isomer

On the right hand isomer, the higher priority groups are on same side of molecule, so it must be the Z isomer.

<p>First we look at the atoms attached to the carbons on either side of the double bond.</p><p>The element with greatest atomic number is given higher priority.</p><p>On left hand side, we have chlorine(17) and bromine(35) atom, so on left side bromine has higher priority</p><p>On right hand side hydrogen (1) and F(9), so fluorine has higher priority.</p><p>On left hand isomer, higher priority groups are on opposite sides, so its the E isomer</p><p>On the right hand isomer, the higher priority groups are on same side of molecule, so it must be the Z isomer.</p>
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