What ⏣ means
It marks six electrons shared around benzene's ring. Aromaticity is the extra stability linked to those electrons.
An early benzene-ring drawing appears in August Kekulé's 1867 work. British chemists James Wilkins Amit and Robert Robinson introduced the circle notation in 1925.
Is the benzene circle the same as alternating bonds?
They show benzene in two ways. Alternating bonds show individual links; the circle summarizes shared electrons. Bond lines help when you need to track individual bonds.
The circle entered introductory textbooks with Morrison and Boyd's 1959 edition. A 2009 history records debate over extending it to other rings.
Specialist chemistry notation; its displayed outline comes from the reader's font.
Don't confuse it with
1Questions people ask
1Why does ⏣ show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type ⏣
⏣\23E3Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.