1.2 Cyclic Systems
37
drogenation, the additional hydrogen (now called added hydrogen), preceded by its locant, is placed in parentheses immediately behind the
related spiro locant. Both rules can be valid simultaneously. According to a
new proposal only saturation designators that are not self-evident should
be retained in front of the full name.
Dispiro[9H-fluorene-4{ IH),l'{ 4'H)naphthalen -4' ,2" -(2H)indene 1
new: 1,9-Dihydro[fluorene-4,1'naphthalen -4',2" -indene 1
Spiro [anthracene-9{ 10H),
l' -cyclobutane 1
new: lOH-Spiro[anthracene9,1' -cyclobutane]
If a spiro system is composed of two identical subunits the connectivity
locants followed by the term spirobi •. are placed in front of the name of the
partial system.
9,9' -Spirobifluorene
1,2' -Spirobiindene
7,7' -Spirobi[bicyclo
[4.1.0 lhept -3-ene 1
or 7,7'-Spirobi[bicyclO[4.1.0]
heptane ]-3,3' -diene
Di - and polyspiro systems analogously composed of identical subunits can
be treated in the same manner.
37
drogenation, the additional hydrogen (now called added hydrogen), preceded by its locant, is placed in parentheses immediately behind the
related spiro locant. Both rules can be valid simultaneously. According to a
new proposal only saturation designators that are not self-evident should
be retained in front of the full name.
Dispiro[9H-fluorene-4{ IH),l'{ 4'H)naphthalen -4' ,2" -(2H)indene 1
new: 1,9-Dihydro[fluorene-4,1'naphthalen -4',2" -indene 1
Spiro [anthracene-9{ 10H),
l' -cyclobutane 1
new: lOH-Spiro[anthracene9,1' -cyclobutane]
If a spiro system is composed of two identical subunits the connectivity
locants followed by the term spirobi •. are placed in front of the name of the
partial system.
9,9' -Spirobifluorene
1,2' -Spirobiindene
7,7' -Spirobi[bicyclo
[4.1.0 lhept -3-ene 1
or 7,7'-Spirobi[bicyclO[4.1.0]
heptane ]-3,3' -diene
Di - and polyspiro systems analogously composed of identical subunits can
be treated in the same manner.