A 2Π-2Π ELECTRONIC BAND SYSTEM OF THE FREE NCO RADICAL

Abstract

A series of red-degraded absorption bands has been observed between 2650 Å and 3200 Å and is attributed to a 2Π-2Π transition of the NCO radical. The bands probably represent a progression of the upper-state stretching vibration [Formula: see text]. The rotational structure of one band has been analyzed. Diffuseness in some of the bands indicates predissociation of the upper state, and is discussed in terms of the dissociation energy of NCO.