Also contains definition of: topomers
https://doi.org/10.1351/goldbook.T06396
The
identity reaction
leading to exchange of the positions of identical
ligands
. 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
spectroscopy
. This is a degenerate
isomerization
.
Source:
PAC, 1996, 68, 2193. (Basic terminology of stereochemistry (IUPAC Recommendations 1996)) on page 2220 [Terms] [Paper]