The following links will take you to sites where you can download tools to draw chemical and molecules. Chemsketch is easy to use and can output standard form molecules and chemicals. It also as a database of molecules to simplify the drawing of a chemical. The Symyx tools are on my list to evaluate.

• Chemsketch (free for non commercial use).
• Symyx Tools

The figure shows Pentacene drawn using Chemsketch with and without Hydrogen bonds.



Chemskech can then output the chemical symbol in ball and stick form



For other nano related tools and software see our wiki pages on Nano simulation Software and Quick Tools Link.