Watson's Determinable Parameters |
Value a [MHz] |
Derived Parameters (assuming planarity conditions) |
Value a [MHz] |
Ref. |
---|---|---|---|---|
A″ | 30 602.2556(507) | A′ | 30 602.241(51) | 72031 |
B″ | 8823.4827(146) | B′ | 8823.517(14) | |
C″ | 6830.2589(158) | C′ | 6830.356(17) | |
τ1 | 0.234 713(12 794) | τ′bbcc | -0.0285(10) | |
τ2 | 0.023 005(2522) | τ′ccaa | 0.0692(31) | |
τ3 b | 0.383(39) | τ′aabb | 0.1940(94) | |
τaaaa | -1.992 13(655) | τaabb (1) | 0.2813(47) | |
τbbbb | -0.070 847 3(13 806) | τaabb (2) | 0.2612(67) | |
τcccc | -0.014 864(732) | τaabb (3) | 0.2612(67) | |
HJ | τabab (1) | -0. 0436(36) | ||
HJK | τabab (2) | -0.0269(66) | ||
HKJ | τabab (3) | -0.0234(75) | ||
HK | Δτ | -0.119(37) x 10-2 | ||
hJ c | ||||
hJK | ||||
hK | ||||
Std. dev. | 0.151 | |||
No. lines fit | 73 |
a The uncertainties quoted are one standared deviation as estimated by the least squares fit. The number of significant figures quoted are necessary to reproduce the calculated transition frequencies within their standard deviations.b Strictly speaking, τ3 is not a determinable parameter, but is calculated from τ1, τ2, τaaaa, and τbbbb using the planarity conditions.
c Watson uses 2hJ for this parameter.
Isotopic Species |
Vib. State υ1 υ2 υ3 |
A [MHz] |
B [MHz] |
C [MHz] |
Ref. |
---|---|---|---|---|---|
28Si19F2 | 0 0 0 | a | a | a | |
1 0 0 b | 30 651.64(17) | 8768.17(6) | 6797.70(90) | 73036 | |
0 1 0 | 31 054.31(4) | 8807.71(3) | 6808.23(1) | 66021 | |
0 0 1 b | 30 300.85(13) | 8809.96(5) | 6806.57(90) | 73036 | |
29Si19F2 | 0 0 0 | 29 994.39(37) | 8823.77(5) | 6799.63(14) | 66021 |
30Si19F2 | 0 0 0 | 29 428.3 | 8824.0 | 6770.2 | |
Electric dipole moment | |||||
28Si19F2 | µb [D] |
1.230(15) |
65012 |
a See ground state constants.b The intervibration-state transition,
υ1 = 1, 854 ← υ3 = 1, 817, has ben measured at54 351.8(1) MHz [73036]. Due to format difficulties, this is not shown in the microwave spectrum of 28Si19F2.Additional reference [66020].