5. Chirality

Test 1:Plane of Symmetry

5. Chirality

# Test 1:Plane of Symmetry

The simplest test for chirality is symmetry. If a molecule has an internal line of symmetry, it is ** achiral**.

1

concept

## How and when to use the internal line of symmetry test.

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- Unfortunately, this test is only practical for
__rings__.

This is what we call a Hawthorne Projection. It’s a way to visualize rings in 3D. It’s really easy to tell if these molecules have a plane of symmetry or not.

2

example

## Determining Chirality with Plane of Symmetry

25s

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This is a 2D ringed structure. It’s super easy to predict a plane of symmetry on this one.

3

example

## Determining Chirality with Plane of Symmetry

43s

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The plane of symmetry is allowed to split atoms! Just look for any line that can create equal images on both sides.

4

example

## Determining Chirality with Plane of Symmetry

1m

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Do you think TEST 1 will work well on this molecule? Why or why not?

5

example

## Determining Chirality with Plane of Symmetry

2m

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## Do you want more practice?

We have more practice problems on Test 1:Plane of Symmetry

Additional resources for Test 1:Plane of Symmetry