proceeds from reactants
(on left) to products
|Indicates electron donation from
base to a Lewis
acid in a Lewis
base adduct: Lewis
acid. This usage not common.
|Indicates a pi bond
interaction between elements not in the same period
(row) of the periodic table; a very polar
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.
Shafts lengths are not meant to imply Keq
≠ 1, or stated
structures on either end of the arrow are resonance
arrow indicating shift of an
electron pair. Note this arrow has two barbs on the pointy end.
|Curved arrow indicating shift of a single electron. Note this arrow has one barb on the pointy end.|
arrow. Designates that the molecule of the left is derived from the
molecule on the right.
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+