How to add numbers to a structure

How to add numbers to a structure

1. Select the full structure or atom to number.
2. click ' (apostrophe)


Note: Numbering will not be as per IUPAC numbering system.


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Draw allenes with central carbon atom as a dot

Using Chem Draw

1. Draw an allene  
2. Right-click on the central carbon and choose Edit Label.
3. Type a bullet character (Alt-0149) . 

Using ChemSketch


Using Marvin Draw

How to draw chemical structure

How to draw chemical structure

This series has quick fix for common structure drawing problems.