Diborane . High-resolution infrared rovibration studies of 10B2H6</SBT>

Four infrared active bands of ¹⁰B ₂H ₆ were studied with a resolution of ∼0.05 cm ^-1 — the type- A fundamentals, ν₁₇ (BH bridge stretching) and ν₁₈ (BH terminal deformation), and the type- C fundamental, ν₁₄ (BH terminal wagging), and combination, ν₉ + ν₁₅. From assignments in these bands, asymmetric-rotor ground-state parameters were determined from more than 500 combination differences. Upper-state parameters for all four vibrations are determined, and a few local perturbations are noted.