Table 3
Low-order spectroscopic parameters or differences (Δ) thereofa of methyl cyanide describing the Fermi interaction between ν8 = 1 and ν8 = 2.
| Parameter | CH3CNb | CH CNc |
13CH3CNc | CH3C15Nc | ||||
|
|
||||||||
|
716.750 42 (13) | 701.10 | 715.82 | 711.53 | ||||
| Δ(A−B) | −187.404 (18) | −187.4 | −187.4 | −187.4 | ||||
| ΔB | 54.057 316 (111) | 51.856 | 52.411 5 | 52.759 1 | ||||
|
739.148 225 (56) | 723.01 | 738.19 | 733.76 | ||||
| Δ(A−B) | −259.956 (122) | −260.0 | −260.0 | −260.0 | ||||
| ΔB | 54.502 729 (70) | 52.283 3 | 52.843 35 | 53.193 85 | ||||
| Aζ | 138 656.042 (102) | 139 829.5 | 138 858. | 138 555. | ||||
| q | 17.729 857 (138) | 18.141 2 | 16.738 2 | 16.794 9 | ||||
| F(8± 1,82, ∓ 2) | 53 157.7 (33) | 54 567. (744) | 51 647. (1303) | 51 298. (2967) | ||||
| FK(8± 1,82, ∓ 2) | −6. | −6. | −6. | −6. | ||||
| FJ(8± 1,82, ∓ 2) | −0.369 89 (44) | −0.370 | −0.359 | −0.359 | ||||
| FJJ(8± 1,82, ∓ 2) × 106 | 1.681 (87) | 1.70 | 1.58 | 1.58 | ||||
Notes.
All parameters in MHz units except and in cm-1. Numbers in parentheses are one standard deviation in units of the least significant figures. Parameters without quoted uncertainties were estimated and kept fixed in the analyses; see also Sect. 3.
From Müller et al. (2015).
This work. Ground state parameters for corresponding isotopolog kept fixed to values in Table 2.
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