释义 |
See Joseph Achille Le Bel See Joseph Achille Le BelLe Bel, Joseph Achille
Le Bel, Joseph Achille, French chemist, 1847-1930. Le Bel-van't Hoff rule - the number of stereoisomers of an organic compound is 2n where n represents the number of asymmetric carbon atoms unless there is an internal plane of symmetry. |