The recent confirmation by photoelectron spectroscopy of direct interaction between the cyclopropane ring and the n-orbitals in spiro [2.4] hepta-4, 6-diene (1)'has rekindled interest in the properties of spirocyclopentadiene derivatives. Within the homologous series of spirodienes 1-3, spiro [3.4] octa-5, 7-diene (2) has until now escaped synthesis and characterization despite a number of reported attempts. 2, 3 This material by virtue of its ...
![Spiro[3.4]octan-6-one,7-chloro- Structure](https://image.chemsrc.com/caspic/438/50782-03-1.png)