ON THE HIGH-RESOLUTION HEI PHOTOELECTRON-SPECTRUM OF CL2O

The high-resolution HeI (58.4 nm) photoelectron spectrum of dichlorine monoxide, Cl2O, has been recorded in the region of the four lowest-en ergy ionic electronic states. Formation of the ion in its ground and e xcited electronic stales is accompanied in each case by vibrational ex citation. In particular, the vibrational structure of the first and se cond excited states of Cl2O+ is resolved, Analysis of the vibrational progressions associated with formation of the various ionic states has been completed, allowing confirmation of the symmetry aad bonding cha racteristics of the four highest-energy occupied molecular orbitals of Cl2O. (C) 1998 Elsevier Science B.V.