A regular @B00682@ that can be described by only one species of @C01253@ in a single sequential arrangement.
Source: Purple Book, 1st ed., p. 17 [Terms] [Book]
Citation: 'tactic block' in IUPAC Compendium of Chemical Terminology, 3rd ed. International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. https://doi.org/10.1351/goldbook.T06242 RISBibTexEndNote