A<unk> , or stereogenic centre, is any atom in a molecule bearing groups such that an interchanging of any two groups leads to a stereoisomer . In organic chemistry this usually refers to  a carbon, phosphorus or sulfur atom, though it is also possible for other atoms to be<unk> s in organic and inorganic chemistry.
A molecule can have multiple<unk> s, giving it many stereoisomers. In compounds whose stereoisomerism is due to tetrahedral stereogenic centers, the total number of hypothetically possible stereoisomers will not exceed 2n, where n is the number of tetrahedral<unk> s. Molecules with symmetry frequently have fewer than the maximum possible number of stereoisomers.
The term<unk>  was introduced in 1984 by Mislow and Siegel .
The broad term<unk>  is often confused with that of the narrower set of chirality center. It is important to remember that a compound like 2-butene has two<unk> s forming two possible stereoisomers (cis and trans 2-butene) (and not 4!) and is not considered a meso compound
Stereocenter
Segrosome
Germander
Centromere
Ovacome
Antineoplaston
Electron shell
Carbuncle