Seniority ring systems

TABLE 1.5 Trivial Names of Heterocyclic Systems Suitable for Use in Fusion Names Listed in order of increasing priority as senior ring system. [Pg.13]

If the characteristic group occurs in more than one cyclic system, that system is chosen as parent which (a) carries the largest number of the principal group or, failing to reach a decision, (b) is the senior ring system. [Pg.20]

If the characteristic group occurs both in a chain and in a cyclic system, the parent is that portion in which the principal group occurs in largest number. If the numbers are the same, that portion is chosen which is considered to be the most important or is the senior ring system. [Pg.20]

Listed in order of increasing priority as senior ring system... [Pg.14]

The basic order of seniority of subunits is heterocyclic rings and ring systems > heteroatom chains > carbocyclic rings and ring systems > acyclic carbon chains... [Pg.284]

Among heterocyclic rings and ring systems, the descending order of seniority is ... [Pg.284]

The order of decreasing seniority within a given heterocyclic ring or ring system is ... [Pg.285]

Examples of the application of seniority among carbocyclic rings and ring systems are (appropriate rule in parentheses) ... [Pg.287]

Seniority of ring systems [1] is decided by applying the following criteria, successively, until a decision is reached ... [Pg.323]

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