“…Some years ago one of us published three articles on the spectroscopy of the first member of the noble-metal-dihalide family, the CuCl 2 molecule. In the first two, attention was focused on the nature of the ground state [2] and on the C and D fine-structure states derived from the 2 D g state [3] since, despite numerous and recent works dedicated to the experimental [4][5][6][7][8][9][10][11][12] and theoretical [13][14][15][16][17][18][19][20] study of CuCl 2 , many unsolved questions concerning several aspects of the spectroscopy of this apparently simple molecule needed a deeper explanation.…”