CH ENGR 104C Lecture Notes - Lecture 19: Carl Wilhelm Scheele, Jean-Baptiste Biot, Asymmetric Carbon
7 Feb 2017
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Christian huygens discovered plane-polarized light in the late 17th century. In 1815, jean baptiste biot found that certain natural organic compounds, both liquids. A brief history and solutions, rotate plane-polarized light. Carl wilhelm scheele made an important contribution to stereochemistry when studying the barrels and corks during grape juice fermentation. He discovered racemic acid in 1819 which had the identical structure (same chemical formula) of tartaric acid. tetrahedral and that a molecule possessing a tetrahedral carbon can exist as a pair of isomers. Joesph achille lebel and joobus henricus van"t hoff, in 1874, proposed carbon is (source: thinkbook 14-c; hardinger; pgs 11-14) Asymmetric carbons, chirality centers, and stereocenters (bruice 4th edition, 5. 3, 5. 17, Examples: (hardinger online tutorial; stereochemistry- identifying stereocenter) stereocenter. H not a stereocenter (does not have four different attachments) Remember that a stereocenter needs to have 4 different attachments. Notice the difference between chiral and enantiomers chiral refers to any object and enantiomers strictly refers to molecules.
