Neutral C3O has been prepared by collision induced neutralisation of the pr
ecursor radical anion formed by the reaction C-=C-CO-OEt --> C3O-. +EtO. .
The similar neutralisaaion reionisation (-NR+) and charge reversal (CR) spe
ctra of C3O-. indicate that the potential surfaces of C3O and C3O+. show fa
vourable vertical Franck-Condon overlap, This suggests that the bond connec
tivities of anion, neutral and cation C3O are the same. Copyright (C) 1999
John Wiley & Sons, Ltd.