For a @R05249@ containing double bonds in the main chain of the @C01286@ these are the fractions of such double bonds that are in the cis and @C01092@ configurations, respectively.
Source: Purple Book, 1st ed., p. 46 [Terms] [Book]
Citation: 'degrees of cistacticity and transtacticity' 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.D01571 RISBibTexEndNote