PHOTOELECTRON SPECTRUM OF DISPIRO[2.2.2.2]DECA-4,9-DIENE. CONJUGATION OF WALSH ORBITALS OF CYCLOPROPANE RINGS WITH ORBITALS OF DIENE
To study the interaction between the Walsh orbitals of cyclopropane rings and its adjacent π-orbitals the photoelectron spectrum of dispiro[2.2.2.2]deca-4,9-diene has been measured by using the 21.22 eV helium resonance line. The first four bands in the PE spectrum have been assigned on the basis of a modified CNDO/2 approximation.