stereocenter
Noun
Meaning
English Wikipedia has an article on:stereocenterWikipedia
stereocenter (plural stereocenters)
Alternative spelling of stereocentre
Anagrams
Examples
After the substituents of a stereocenter have been assigned their priorities, the molecule is oriented in space so that the group with the lowest priority is pointed away from the observer.
If the relative priorities of these substituents need to be established, R takes priority over S. When this happens, the descriptor of the stereocenter is a lowercase letter (r or s) instead of the uppercase letter normally used.
Cycles To handle a molecule containing one or more cycles, one must first expand it into a tree (called a hierarchical digraph by the authors) by traversing bonds in all possible paths starting at the stereocenter.
Assignment of priorities R/S and E/Z descriptors are assigned by using a system for ranking priority of the groups attached to each stereocenter.
However, one should note that adding a chemical group to the prochiral center from the re-face will not always lead to an S stereocenter, as the priority of the chemical group has to be taken into account.
More definitions * A configurational stereoisomer is a stereoisomer of a reference molecule that has the opposite configuration at a stereocenter (e.