Also, it is a lot of fun to draw the 2D molecules on the iPad! But the 3D model does not work in mobile Safari yet. Second, the site is a great tool for showing/learning the connection been nomenclature and structure (what's the difference between 1-butene and 2-butene?), as well as the connection between 2D and 3D structure (cyclohexane is not flat like benzene!).Ĭurrently, in order to see the 3D model you need to use the Chrome or Firefox 4 browser. *Also, there is actually an easier way as explained in the comments. UPDATE: Kevin has informed me that the coordinates you get are the 2D coordinates from the sketcher. In the screencast I show how to save the file and load it into Avogadro for minimization and GAMESS input file generation. And of course you can modify the structure further, using aspirin as a starting point. generate the coordinates of), say, aspirin, than typing 'aspirin'. I have written about ' 2D to 3D building' before, but what makes this site special is the integration with MolGrabber combined with Chemical Indentifier Resolver by Markus Sitzmann, which generates 3D coordinates.įirst, I can't think of an easier way* to build (i.e. When you have drawn the target acetic acid molecule, click the 'submit' button to check your answer.Kevin Theisen and his colleagues over at iChemLabs have made a very useful web page that is both a great builder and a great educational tool.

The shape of the molecule doesn't matter, but be sure that you have included the double bond to oxygen and the four lone pairs before submitting your drawing. If the symbol that you want doesn't appear, press repeatedly to cycle through the possible symbols. To overwrite an atom with the keyboard, hover the cursor over the atom and when the brown circle appears press the key for the first letter of the element symbol. You have already overwritten atoms with the label tool in the CO2 molecule. Or you can use the bond tool to quickly complete a carbon skeleton, like the one on the right above, by just clicking on existing Catoms, then use either the Set Label tool or the keyboard to overwrite the necessary atoms. o H H-c-d H 0-11 You can draw the two C atoms with the bond tool, and then use the Set Label tool to add the rest of the atoms by clicking and dragging. Nd ChemDoodle 3D (References) ChemDoodle Sketcher: Lewis Structures: The Acetic Acid Molecule-Adding H atoms and Overwriting Atoms In this question, your goal is to draw a Lewis structure for the acetic acid molecule, CH3COOH.

Chem doodle