1849 ⟶ Louis Pasteur clarifies optical rotation and advances stereochemistry
Louis Pasteur discovers that the racemic form of tartaric ac...
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💧 Joseph Louis Gay-Lussac Determines Water Composition by Volume
Joseph Louis Gay-Lussac discovers that water is composed of two parts hydrogen and one part oxygen by volume.⟶
ChemistryWaterGay-LussacCompositionVolume19th Century
France⚛️ Wöhler and Liebig Discover Isomers
Friedrich Wöhler and Justus von Liebig perform the first confirmed discovery and explanation of isomers, earlier named by Berzelius. Working with cyanic acid and fulminic acid, they correctly deduce that isomerism was caused by differing arrangements of atoms within a molecular structure.⟶
ChemistryIsomerismMolecular structureOrganic chemistry19th centuryAtomsScientific discovery
Germany🧪 Louis Pasteur clarifies optical rotation and advances stereochemistry
Louis Pasteur discovers that the racemic form of tartaric acid is a mixture of the levorotatory and dextrotatory forms, thus clarifying the nature of optical rotation and advancing the field of stereochemistry.⟶
StereochemistryOptical IsomerismTartaric AcidLouis PasteurChemistryMolecular Structure19th Century
France🦠 Louis Pasteur states that microorganisms produce fermentation
Louis Pasteur stated that microorganisms produce fermentation.⟶
FermentationMicroorganismsLouis PasteurGerm TheoryBiology19th CenturyBiochemistry
France⚛️ Friedrich August Kekulé proposes carbon tetravalence
Friedrich August Kekulé von Stradonitz proposes that carbon is tetravalent, or forms exactly four chemical bonds.⟶
Carbon TetravalenceMolecular StructureFriedrich August KekuléOrganic ChemistryChemical Bonds19th CenturyChemistry
Germany⚛️ Kekulé's Discovery of Benzene Ring Structure
Friedrich August Kekulé von Stradonitz realized that benzene is composed of carbon and hydrogen atoms in a hexagonal ring.⟶
ChemistryOrganic ChemistryKekuléBenzeneMolecular Structure19th CenturyStructural FormulaChemical Bonding
Germany