Simplified Molecular Input Line Entry System: Difference between revisions

Revision as of 18:14, 27 October 2021

Revision as of 18:15, 27 October 2021

Line 91:

=== Aromaticity ===

[[Aromaticity|Aromatic]] rings such as [[benzene]] may be written in one of three forms:

# In [[KekuléAugust formKekulé|Kekulé]] form with alternating single and double bonds, e.g. <code>C1=CC=CC=C1</code>,

# Using the aromatic bond symbol <code>:</code>, e.g. <code>C1:C:C:C:C:C1</code>, or

# Most commonly, by writing the constituent B, C, N, O, P and S atoms in lower-case forms <code>b</code>, <code>c</code>, <code>n</code>, <code>o</code>, <code>p</code> and <code>s</code>, respectively.