https://doi.org/10.1351/goldbook.T06396
The @[email protected] leading to exchange of the positions of identical @[email protected] 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 @[email protected] This is a degenerate @[email protected]
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