Noun
English Wikipedia has an article on:stereocenterWikipedia
stereocenter (plural stereocenters)
Alternative spelling of stereocentre
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. Source: Internet
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. Source: Internet
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. Source: Internet
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. Source: Internet
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. Source: Internet
More definitions * A configurational stereoisomer is a stereoisomer of a reference molecule that has the opposite configuration at a stereocenter (e. Source: Internet