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Arrow
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Explanation
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Example
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![](arrows01.png)
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Reaction proceeds from reactants
(on left) to products
(on right). |
![](arrows02.png) |
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![](arrows01.png) |
Indicates electron
donation from a Lewis
base to a Lewis
acid in a Lewis
acid-Lewis
base
adduct: Lewis
base→Lewis
acid. This usage not common. |
![](arrows03.png)
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![](arrows01.png) |
Indicates a pi
bond interaction between elements not in the same period
(row) of the periodic table; a very polar
pi
bond. For example S→O in a sulfoxide.
The arrows points from the less electronegative
element to the more electronegative
element. This usage is not common. |
![](arrows04.png)
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![](arrows05.png)
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Equilibrium.
Shafts lengths are not meant to imply Keq ≠
1, or stated otherwise. |
![](arrows06.png)
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![](arrows07.png)
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The structures
on either end of the arrow are resonance
contributors. |
![](arrows08.png)
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![](arrows09.png)
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Curved
arrow indicating shift of an electron pair. Note this
arrow has two barbs on the pointy end. |
![](arrows10.png)
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![](arrows11.png)
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Curved
arrow indicating shift of a single electron. Note this
arrow has one barb on the pointy end. |
![](arrows12.png)
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![](arrows13.png)
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Photon
added. |
![](arrows14.png)
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![](arrows15.png)
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Retrosynthesis
arrow. Designates that the species of the left is derived
from the species on the right. |
![](arrows16.png)
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![](arrows17.png)
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Bond
dipole arrow. The arrow head points to the more electronegative
atom (the δ-
atom); the crossed end of the arrow lies above the more electropositive
atom (the δ+
atom). |
![](arrows18.png)
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![](arrows19.png)
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The species to the left of
this arrow leaves the reaction mixture as a precipitate. |
![](arrows20.png)
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![](arrows21.png)
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The species to the left of
this arrow leaves the reaction mixture as a gas. |
![](arrows22.png)
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![](arrows23.png)
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A electron pair in an orbital.
A single arrow (pointing up or down) can be used to denote a
single electron in an orbital.
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![](arrows24.png)
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