Organic Chemistry Calculator

It's been a while since I last used a free online tool for chemistry, that combines different aspects of organic chemistry, such as: structure, stoichiometry and general reaction mechanisms. But yesterday evening, while searching on the internet, I found a seemingly useful, free, online tool that definitely caught my eye straightway.

It was a quite complex software produced by professor Andreas Herrmann's team in the Polymer Chemistry and Bioengineering department at Groningen University. The software allows you to draw the structures of different compounds and put them in printable version, to calculate the ammounts of substance needed in different organic reaction processes containing up to six reactions. So, I consider it to be pretty useful. Its link is the following: http://chemist.hosting.paran.com/orgchem/

To test the efficiency of this software, let's try to synthesize an organic compound, for instance urea (the first organic compound to be ever synthesized), from inorganic compounds. Firstly, fill in the name of the reaction in the title section, in this case Wöhler Synthesis. In the structure drawing section, let's draw the structural formula of urea.

Click on the double bond tool and then click in the middle of the drawing field.

Select the Oxygen tool and click in one of the double bond's ends.

Now select the simple bond tool and double click on the other end of the double bond. By doing this, two simple bonds will appear connected to the double bond.

Select Nitrogen tool and click on each of the simple bonds' free end. Now, urea should look like this:

Now look at the proper calculator. You know that AgNCO + NH₄Cl → (NH₂)₂CO + AgCl is the reaction implied. In the starting formula cell, introduce the formula of AgNCO and in the product formula cell write the formula of urea ((NH2)2CO). By pressing the ">" sign near these two cells the molar masses will be automatically generated. As a starting amount of AGNCO let's take 100 grams, for example. After doing this, press again the ">" in the current cell. The number of moles will be generated this time. Because the equation is balanced with no coefficient, we leave the equivalent section untouched (the default value is 1). Now we can calculate the amount of urea produced by pressing "evaluate". If the result is 40.069389 then you have understood how to use this organic chemistry calculator. If not, re-read the tutorial and do exactly as told because I consider this tool very interesting and useful.

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