Extended Data Table 3 Spectroscopic parameters of CH3+

From: Formation of the methyl cation by photochemistry in a protoplanetary disk

  1. *Rotational, centrifugal distortion, and Coriolis constants in the ground state, v3 = 1, v2 = 1, and v4 = 1 (in cm−1), and transition moments of the ν2 and ν4 bands. Comparison of quantum calculated values, and those used to best model the spectrum of the d203-506 source around 1400 cm−1. aValues in brakets (in blue) are scaled according to v3 = 1 results when available, to v = 0 otherwise. bωB97X-D/cc-pVQZ, this work. cCoriolis interaction parameter between v2 = 1 and v4 = 1, unitless. dTransition dipole moment of the νi fundamental bands, in Debye.
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