Singlet Electronic States of the TiO Molecule.

Rotational analyses of the bands in the spectrum of the Ti0 molecule at 8859 A and 5597 A have made it possible to identify the corresponding electronic transitions as `11 -`A and ` - `A, respectively. The two transitions have a common lower state. The resulting rotational constants are presented in Table 3. It is shown that the two bands are the (O ) bands of the respective systems. Additional bands of the two systems are listed in Tables 5 and 6. The excitation energies, Poo, of the `11- and are 11,272.77 and 17,840.60 , above the `A-state, respectively.