1.2 Cyclic Systems
15
these are listed in Table 1 in ascending order of seniority. Systems comprising only benzene units and their substitution products are generally
designated as arenes or, traditionally, aromatics. Fused hydrocarbon systems for which no trivial names are retained are systematically named as
follows:
That component that has the largest ring orland that - if it is a trivial
system according to Table 1 - contains the largest number of rings is
defined as parent (or base or primary or main) component. All other
components are attached in the form of prefixes to the parent name by
changing their ending ... ene to ... eno. The following abbreviated prefix
forms are retained:
Acenaphtho from Acenaphthylene Naphtho
Perylo
Phenanthro
from Naphthalene
from Perylene
from Phenanthrene
Anthra
from Anthracene
Benzo
from Benzene
With the exception of benzo, fusion prefixes for mono cyclic systems are
treated as exemplified for cyclopenta, cyclohepta etc. It should be noted
here that for fused polycyclic systems the ending ... ene always indicates
the maximum number of non-cumulative double bonds, that is, a mancude system!
Cyclopentacyclononene
or Cyclopenta [9] annulene
not: Cyclopentadienocyclononatetraene
Benzocyclooctene
or Benzo[8]annulene
not: Benzocyclooctatetraene
For the following compounds Chern. Abstr. incomprehensibly uses the von
Baeyer names bicyclo[4.2.0]octa-I,3,5,7-tetraene and IH-bicyclo[4.1.0]
hepta-I,3,5-triene that totally disregard the aromatic character of these
compounds.
Cyclobutabenzene Cyclopropabenzene
15
these are listed in Table 1 in ascending order of seniority. Systems comprising only benzene units and their substitution products are generally
designated as arenes or, traditionally, aromatics. Fused hydrocarbon systems for which no trivial names are retained are systematically named as
follows:
That component that has the largest ring orland that - if it is a trivial
system according to Table 1 - contains the largest number of rings is
defined as parent (or base or primary or main) component. All other
components are attached in the form of prefixes to the parent name by
changing their ending ... ene to ... eno. The following abbreviated prefix
forms are retained:
Acenaphtho from Acenaphthylene Naphtho
Perylo
Phenanthro
from Naphthalene
from Perylene
from Phenanthrene
Anthra
from Anthracene
Benzo
from Benzene
With the exception of benzo, fusion prefixes for mono cyclic systems are
treated as exemplified for cyclopenta, cyclohepta etc. It should be noted
here that for fused polycyclic systems the ending ... ene always indicates
the maximum number of non-cumulative double bonds, that is, a mancude system!
Cyclopentacyclononene
or Cyclopenta [9] annulene
not: Cyclopentadienocyclononatetraene
Benzocyclooctene
or Benzo[8]annulene
not: Benzocyclooctatetraene
For the following compounds Chern. Abstr. incomprehensibly uses the von
Baeyer names bicyclo[4.2.0]octa-I,3,5,7-tetraene and IH-bicyclo[4.1.0]
hepta-I,3,5-triene that totally disregard the aromatic character of these
compounds.
Cyclobutabenzene Cyclopropabenzene