High-resolution spectra of the coupled 2v(1), 2v(3) and v(1) + v(3) states of H2Se have been studied. The vibration-rotation transitions of (H2Se)-Se-n (n = 82, 80, 78, 77 and 76) were assigned by using the ground-state combination differences and least-squares fitted to yield the vibration-rotation parameters. Several striking local-mode effects are observed and discussed
