Table 4.
Changes of molecular parameters for the v29 = 1 vibrational states of g-n-PrCN obtained from our latest fit using Watson’s S reduction compared to the fit of Müller et al. (2016).
| Parameters | v29 = 1 | v29 = 1 |
|---|---|---|
| (MHz) | ΔX, (Müller et al. 2016) | ΔX, this work |
| A | 23.7237(5) | 23.7238(2) |
| B | 2.49394(13) | 2.49329(5) |
| C | 0.43186(12) | 0.43322(3) |
| DK × 103 | −0.829(4) | −0.8467(11) |
| DJK × 103 | 0.1557(8) | 0.15941(13) |
| DJ × 106 | −20.64(22) | −20.188(10) |
| d1 × 106 | 1.804(33) | 2.589(7) |
| d2 × 106 | −1.244(18) | −0.984(5) |
| HK × 106 | −0.0773(19) | |
| HKJ × 109 | 42.8(41)a | 41.48(15) |
| HJK × 109 | −6.26(27) | −2.35(2) |
| HJ × 109 | −0.524(95) | −0.2729(10) |
| h1 × 1012 | −103.7(8) | |
| h2 × 1012 | 180.0(15) | −2.05(59) |
| h3 × 1012 | 48.1(64) | 1.305(198) |
| WRMS | 0.93 | 0.98 |
| Highest frequency | 126723 | 499625 |
| Max J″ | 52 | 90 |
| Max K″a | 19 | 32 |
| Transitions | 706 | 2856b |
Notes. The molecular parameters of v29 = 1 are expressed as Xv = 1 = Xv = 0 + ΔX. Numbers in parantheses represent the uncertainty compared to the last quoted digit. The hyperfine structure parameters used were from Vormann & Dreizler (1988). Other ground-state parameters used in Müller et al. (2016) were from Belloche et al. (2009). The parameters determined in this work are based on the up-dated ground-state parameters.
ΔHKJ had an error in sign in Müller et al. (2016) that is corrected here.
We checked 288 Q-branch b-type transitions used in Müller et al. (2016) and re-assigned 41 transitions with internal rotation splitting.
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