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R-2.4.4.1 Assemblies of two identical cyclic systems are named in one of two ways: (a) by placing the prefix 'bi-' before the name of the corresponding substituent group (see R-2.5) enclosed in parentheses, if necessary (additive operation); or (b) by placing the prefix 'bi-' before the name of the corresponding parent hydride enclosed in parentheses, if necessary (conjunctive operation).
R-2.4.4.2 Unbranched assemblies consisting of three or more identical ring systems are named by placing an appropriate numerical prefix 'ter-', 'quater-', 'quinque-', etc. (see R-0.1.4.3), before the name of the parent hydride corresponding to the repetitive unit.Examples to R-2.4.4.1
As exceptions, unbranched assemblies consisting of benzene rings are named by using the appropriate numerical prefix with the substituent prefix name 'phenyl'.Examples to R-2.4.4.2
Examples to R-2.4.4.2
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