Jennifer Quinones ,August Kekule

  • Birth of Friedrich August Kekule von Stradonitz

    Birth of Friedrich August Kekule von Stradonitz
    Born in Darmstadt, Grand Dutchy of Hesse to a civil servant.
  • Graduated

    Graduated from secondary school and entered the University of Giessen with the intentions to study architecture. But, soon changed to chemistry after hearing the lectures of Justus von Liebig.
  • Postdoctoral Felowships

    Postdoctoral Felowships
    Following his education in Giessen, he took postdoctoral fellowships in Paris (1851-52), in Chur Switzerland (1852-53), and in London (1853-55), where he was influenced by Alexander Williamson.
  • Privatdozent

    Kekulé became Privatdozent (private lecturer) at the University of Heidelberg.
  • Theory of Chemical Structure

    Theory of Chemical Structure
    This theory proceeds from the idea of atomic valence, especially the tetravalence of carbon (which Kekulé announced late in 1857) and the ability of carbon atoms to link to each other (announced in a paper published in May 1858), to the determination of the bonding order of all of the atoms in a molecule.
  • Full Professor

    Full Professor
    He was hired as full professor at the University of Ghent.
  • Structure of Benzene

    Structure of Benzene
    Kekulé published a paper in French, suggesting that the structure contained a six-membered ring of carbon atoms with alternating single and double bonds.
  • Return to Bonn

    Return to Bonn
    He was called to Bonn, where he remained for the rest of his career.
  • Defending His Theory

    Defending His Theory
    Since ortho derivatives of benzene were never actually found in more than one isomeric form, Kekulé modified his proposal and suggested that the benzene molecule oscillates between two equivalent structures, in such a way that the single and double bonds continually interchange positions.
  • Benzene's 25th Anniversary

    Benzene's 25th Anniversary
    The new understanding of benzene, and hence of all aromatic compounds, proved to be so important for both pure and applied chemistry after 1865 that the German Chemical Society organized an elaborate appreciation in Kekulé's honor, celebrating the twenty-fifth anniversary of his first benzene paper.
  • Death of August Kekule

    Death of August Kekule
    He died in Bonn, Germany.
  • Nobel Prize

    Nobel Prize
    Of the first five Nobel Prizes in Chemistry, his students won three: van't Hoff in 1901, Fischer in 1902 and Baeyer in 1905.