Also contains definition of: topomers
The @I02940@ leading to exchange of the positions of identical @L03518@. The indistinguishable molecular entities involved are called topomers. For example in the reaction below the two identical ligating atoms Na and Nb are interchanged by rotation about the C-aryl bond but may be identified by NMR @S05848@. This is a degenerate @I03295@.
PAC, 1996, 68, 2193. (Basic terminology of stereochemistry (IUPAC Recommendations 1996)) on page 2220 [Terms] [Paper]