Compounds of the general formula shown above. They may be considered to be spiro compounds having bridges of carbon atoms connecting the α and α' positions.
Source:
PAC, 1995, 67, 1307
(Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995))
on page 1335
Transformed and rewritten from PDF version (entry
http://www.iupac.org/goldbook/F02336.pdf)
by: Miloslav Nic, Jiri Jirat, Bedrich Kosata, ICT Prague, Czech Republic
