1.2 Cyclic Systems
Benzo [1,2:3,4:5,6] triscyclooctene
or: Benzo[I,2:3,4:5,6]tri[8]annulene
Tribenzo [a,c,e] cyclooctene or
Tribenzo [a,c,e] [8] annulene
27
If a fused hydrocarbon contains saturated positons - ",CH and/or ~CH2
groups exhibiting indicated hydrogens - these are specified with a locant
and the italicised letter H. When such positions occur pairwise conjugated, the compounds in question are named as di-, tetra-, or perhydroderivatives. If there is a choice, hydrogenated positions must be given
lowest possible locants, indicated hydrogen having precedence and being
placed directly in front of the hydrocarbon name.
H
8
I 9
1
~¢~
~
8aH-Fluorene
3,4-Dihydrophenanthrene
(exceptional numbering)
6
5
4
1
CbJ C H2
4H-Indene
IH-cyclopentacyclooctene
Perhydropentalene
10,12-Dihydroindeno [2, I-b] fluorene
Benzo [1,2:3,4:5,6] triscyclooctene
or: Benzo[I,2:3,4:5,6]tri[8]annulene
Tribenzo [a,c,e] cyclooctene or
Tribenzo [a,c,e] [8] annulene
27
If a fused hydrocarbon contains saturated positons - ",CH and/or ~CH2
groups exhibiting indicated hydrogens - these are specified with a locant
and the italicised letter H. When such positions occur pairwise conjugated, the compounds in question are named as di-, tetra-, or perhydroderivatives. If there is a choice, hydrogenated positions must be given
lowest possible locants, indicated hydrogen having precedence and being
placed directly in front of the hydrocarbon name.
H
8
I 9
1
~¢~
~
8aH-Fluorene
3,4-Dihydrophenanthrene
(exceptional numbering)
6
5
4
1
CbJ C H2
4H-Indene
IH-cyclopentacyclooctene
Perhydropentalene
10,12-Dihydroindeno [2, I-b] fluorene