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At various points throughout this text, links to supplementary information or special topics will be located in shaded boxes of this kind. |
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| Time Line | |
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| 2000 | |
| olefin metathesis catalytic cross coupling reactions the human genome decoded | |
| 1980 | |
| discovery of fullerenes Woodward Hoffmann rules stereoselective catalytic polymerization xenon hexafluoroplatinate prepared by N. Bartlett | |
| 1960 | |
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applications of photochemistry structure of vitamin B12 conformational analysis DNA double helix described X-ray of DNA obtained by R. Franklin nuclear magnetic resonance spectroscopy the alpha-helix is described partition chromatography E. Fermi builds the first fission reactor | |
| 1940 | |
| W. Carothers discovers nylon L. Hammett defines physical organic chemistry Pauling's Nature of the Chemical Bond catalytic cracking of petroleum Lewis and Bronsted acid-base theories organolithium compounds are made Bohr atomic orbital shell model H. Staudinger describes polymers A. Fleming discovers penicillin | |
| 1920 | |
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G.N. Lewis defines a covalent bond Haber synthesis of ammonia Grignard reagents are made infrared spectroscopy begins | |
| 1900 | |
| M. Gomberg observes a free radical Fischer's elucidation of hexoses Hoffman prepares aspirin | |
| 1880 | |
| configuration of optical isomers Miescher discovers DNA Mendeleev's periodic table | |
| 1860 | |
| Kekule structural formulas Perkin synthesizes mauve Pasteur resolves (±)-tartaric acid Goodyear vulcanizes rubber | |
| 1840 | |
| Wohler synthesizes urea Faraday discovers benzene | |
| 1820 | |
| Avogadro's law Dalton's atomic theory | |
| 1800 | |
