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About Organic Chemistry 1.1

By Docta · Oct 25, 2011 ·
  1. Docta
    Docta’s relearning of organic chemistry continues,

    Breakthrough, The theory of structure

    Organic chemists of the early eighteen hundreds continued analysis of the quantity of elements in organic compounds and quickly found the results of there observations to be in conflict with the laws of chemistry. At that time it was believed that a substances composed of equal elemental quantities were identical in every way.

    The resultant data from quantitative analysis showed that two or more organic compounds composed of identical elements could have totally different physical and chemical properties.

    Two prime example to be found in most text books are Liebig (1803-1873) and Wohler (1800-1882)
    Liebig found that Silver Fulminate and Silver Cyanate had the some formula AgCNO but had distinctly different properties.
    Wohler found that Urea and Ammonium Cyanate had the same formula CH4N2O and that by heating the Ammonium Cyanate it could be converted to Urea, a great moment in science.

    This led to the most important question “why is it so”?

    The theory that it was how the elements were arranged and not the over all molecular weight or formula that defined a substance quickly emerged in the scientific community.
    The name of this new theory “isomerism” was adopted, giving recognition that the difference was a fact and not just a theory. So by adopting isomerism as being self-evident the concept within it was adopted, Molecular Structure.

    Combining power of molecules

    Kekule solves the riddle….



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