The electronic structure of ZrCl

The proposed electronic assignments of our previously reported near infrare d transitions of ZrCl [J. Mol. Spectrosc. 186, 335 (1997); 196, 235 (1999)] have been revised following the suggestion of Sakai, Mogi, and Miyoshi [J. Chem. Phys. 111, 3989 (1999)]. The ground state is now assigned as the X ( 2)Delta state followed by the a (4)Phi state being the lowest in the quarte t manifold. The previously reported transitions [7.3](2)Delta -a (2)Phi, [9 .4](2)Phi -a (2)Phi, and C (4)Delta -X (4)Phi are now reassigned to C (2)Ph i -X (2)Delta, E (2)Phi -X (2)Delta, and d (4)Delta -a (4)Phi, respectively . The new assignments are supported by our own ab initio calculations. Lase r excitation spectra of the 414 nm band system have also been observed at l ow resolution and are attributed to a (4)Gamma -a (4)Phi transition. (C) 20 01 American Institute of Physics.