The structure described here contains the essential ... in the absence of superhelicity, a stable H-y5 isomer is formed with a high association rate. In contrast, for the H-y3 isomer this ...

Isomers are compounds with the same molecular formulae but different structural formulae. They have the same number of each type of atom. They can be part of the same or different homologous ...

If the molecule is not flat, then there is the possibility of obtaining optical isomers with unsymmetrically substituted fluorene derivatives, and some claims have been put forward that such ...