Term: meso structures
https://doi.org/10.1351/goldbook.M03856

Definition:
Relative configurations of consecutive, but not necessarily contiguous, constitutionally equivalent carbon atoms that have a symmetrically-constituted connecting group (if any) are designated 'meso' or 'racemo', as appropriate. Examples: M03856-1.png (The symbol M03856-2.png represents a symmetrically-constituted connecting group, such as –CH2–, –CH2–CH2–, or –CR2–CH2–CR2–.)

Related Terms:
1) meso (http://doi.org/10.1351/goldbook.M03838).

Images:
1) Not defined (https://goldbook.iupac.org/img/inline/M03856-1.png) 
2) Not defined (https://goldbook.iupac.org/img/inline/M03856-2.png) 

Source: Purple Book, 1st ed., p. 37 (http://old.iupac.org/publications/books/author/metanomski.html)

Citation: 'meso structures' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.M03856

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