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Pseudo-asymmetric Carbon Atom
The traditional name for a tetrahedrally coordinated carbon atom bonded to four different entities, two and only two of which have the same constitution but opposite chirality sense. The r/s descriptors of pseudo-asymmetric carbon atoms are invariant on reflection in a mirror (i.e. r remains r, and s remains s), but are reversed by the exchange of any two entities (i.e. r becomes s, and s becomes r). An example is C-3 of ribaric (C-3 is r), xylaric acid (C-3 is s) or hyoscyamine (C-3 is r). The hyphen in pseudo-asymmetric may be omitted.
hyoscyamine
Dear Sanatan Vatsa,
Pseudo Asymmetric Chiral Carbon, the traditional name for a tetrahedrally coordinated carbon atom bonded to four different entities, two and only two of which have the same constitution but opposite chirality sense.The r/s descriptors of pseudo-asymmetric carbon atoms are invariant on reflection in a mirror (i.e. r remains r, and s remains s), but are reversed by the exchange of any two entities (i.e. r becomes s, and s becomes r).
For more idea please visit the following page given below
http://old.iupac.org/goldbook/P04921.pdf
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Well what I know is a Pro Chiral Carbon. But with the given name "Pseudo", it seems both are same.Such a carbon atom that is not Chiral initially, but becomes Chiral after the attack of a my reagent is called a Pro Chiral Carbon.Consider the case of a tertiary butyl free radical, with the form as -•CH(3)---C---CH(2)-Cl|CH(2)-FIf you perform Bromination in the presence of sunlight, then a Br group attaches to the free radical carbon, in super controlled conditions.In such a case, as you can see, the compound in initially not Chiral but after reaction becomes Chiral.This is what we call pro chiral carbon or pseudo chiral carbon.
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