Table 2
Overview of a fit of 28 802 transitions of methylamine with J ≤ 40, K ≤ 17, using 79 parameters floated to give a weighted standard deviation of 1.53.
| Previous study (Kleiner & Hougen 2020) | Present work | |||||
|---|---|---|---|---|---|---|
| Transitions(a) | Number(b) | WRMS(c) | RMS(d) | Number(b) | WRMS(c) | RMS(d) |
| Microwave υt = 0 | 2288 | 1.07 | 0.088 MHz | 2790 | 2.38 | 0.154 MHz |
| Microwave υt = 1 | 137 | 1.39 | 0.154 MHz | 2921 | 3.35 | 0.218 MHz |
| Microwave υt = 2 | – | – | – | 40 | 3.10 | 0.289 MHz |
| MW A/B(e) species | 1098 | 1.04 | 2287 | 3.03 | ||
| MWE(f) species | 1327 | 1.13 | 3464 | 2.85 | ||
| Infrared υt = 1 ← 0 | 11 880 | 1.09 | 0.00053 cm−1 | 11 643 | 0.29 | 0.00015 cm−1 |
| Infrared υt = 2 ← 1 | – | – | 6155 | 1.25 | 0.00063 cm−1 | |
| Infrared υt = 2 ← 0 | – | – | 5253 | 1.27 | 0.00064 cm−1 | |
| Present work | ||||||
|---|---|---|---|---|---|---|
| Exp. Unc.(g) | Number(b) | WRMS(c) | RMS(d) | |||
| 0.0008 cm−1 | 23 051 | 0.59 | 0.00047 cm−1 | |||
| 0.020 MHz | 390 | 4.45 | 0.089 MHz | |||
| 0.045 MHz | 210 | 3.89 | 0.194 MHz | |||
| 0.060 MHz | 3293 | 3.05 | 0.183 MHz | |||
| 0.100 MHz | 1626 | 2.12 | 0.212 MHz | |||
| 0.200 MHz | 105 | 1.33 | 0.257 MHz | |||
| 0.500 MHz | 127 | 0.48 | 0.238 MHz | |||
Notes. (a)Transitions in the upper part of this table are grouped by their torsional υt quantum numbers and/or symmetry species. (b)Number of lines in the category of this row included in the fit. (c)Weighted root-mean-square residual for the lines in this row. (d)Root-mean-square residual in the units of measurement for the lines in this row. (e)Microwave A1, A2, B1 and B2 species. (f)Microwave E1, E2 species. (g)Transitions in the lower part of this table are grouped by assigned measurement uncertainty.
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