| Parameter | Value | Ref. |
|---|---|---|
| A″ [MHz] | 2841.9543(59) | a |
| B″ [MHz] | 1254.8449(32) | |
| C″ [MHz] | 870.7147(29) | |
| τ1 [kHz] | -1.018(800) | |
| τ2 [kHz] | -0.272(250) | |
| τ3 [kHz] | 3.33(200) b | |
| τaaaa [kHz] | 0.17(130) | |
| τbbbb [kHz] | -0.025(22) | |
| τcccc [kHz] | -0.068(214) |
| a J. Phys. Chem. Ref. Data 18(3), 1245-1524 (1989) b Value fixed by setting R6 = 0. |
| Parameter | Ground State | Vibrational State | Ref. | ||
|---|---|---|---|---|---|
| ν23 = 1 | ν23 = 2 | ν48 = 1 | |||
| A [MHz] | 2841.9531(29) | 2841.7902(79) | 2841.6294(150) | 2836.6936(94) | 72069 |
| B [MHz] | 1254.8449(13) | 1254.7722(19) | 1254.7076(27) | 1255.6163(21) | |
| C [MHz] | 870.7148(10) | 871.4697(15) | 872.2276(21) | 871.4793(16) | |
| τaaaa [kHz] | -0.417(367) | -1.839(612) | 0.084(988) | -3.747(815) | |
| τbbbb [kHz] | -0.281(79) | -0.161(126) | -0.411(184) | 0.272(140) | |
| τaabb [kHz] | -0.553(440) | 0.073(734) | -1.280(1078) | 2.543(815) | |
| τabab [kHz] | 0.029(175) | -0.019(342) | 0.248(560) | -0.979(406) | |
| 0 | 188.0(24) | 180.3(19) | |||
| Vibrational State | Ref. | ||||
| ν48 = 1 | ν23 = 1, ν48 = 1 | ν47 = 1 | |||
| A [kHz] | 2831.5965(105) | 2836.5937(157) | 2838.6659(107) | 72069 | |
| B [kHz] | 1256.4039(19) | 1255.5593(31) | 1254.9585(25) | ||
| C [kHz] | 872.2323(16) | 872.2439(23) | 871.2620(18) | ||
| τaaaa [kHz] | -2.296(645) | 2.341(978) | -0.836(154) | ||
| τbbbb [kHz] | 0.011(129) | -0.605(200) | 0.229(154) | ||
| τaabb [kHz] | 1.539(755) | -2.730(1151) | 2.283(884) | ||
| τabab [kHz] | -1.249(405) | 1.031(590) | -1.515(379) | ||
| 272.7(50) | |||||
| Electric Dipole Moment | |||||
| 65034 | |||||
