CF2

Rotational and centricugal distortion constants for 12C19F2
Watson's Determinable
Parameters		 Value a
[MHz]		 Derived Parameters
(assuming planarity conditions)		 Value a
[MHz]		 Ref.
A″ 88 355.0942 ± 0.066 A′ 88 355.071 ± 0.066 73030
B″ 12 507.5392 ± 0.010 B′ 12 507.605 ± 0.010
C″ 10 932.3151 ± 0.009 C′ 10 932.336 ± 0.010
τ1 0.126 447 ± 0.011 τ′bbcc -0.0468 ± 0.0005
τ2 -0.018 180 3 ± 0.0015 τ′ccaa 0.1323 ± 0.003
τ3 b 3.45 ± 0.04 τ′aabb 0.0410 ± 0.008
τaaaa -11.2778 ± 0.036 τaabb (1) 0.3993 ± 0.0046
τbbbb -0.069 138 7 ± 0.0005 τaabb (2) 0.3878 ± 0.0040
τcccc -0.034 071 4 ± 0.0004 τaabb (3) 0.3878 ± 0.0040
HJ (0.1162 ± 0.2) x 10-6 τabab (1) -0.1784 ± 0.0016
HJK (-0.0013 ± 0.6) x 10-5 τabab (2) -0.1681 ± 0.0038
HKJ (-0.2555 ± 0.5) x 10-4 τabab (3) -0.1668 ± 0.0041
HK (0.3337 ± 0.4) x 10-3 Δτ (-0.215 ± 0.07) x 10-3
hJ c (0.132 ± 0.4) x 10-7 S 0.82
hJK (0.4325 ± 0.3) x 10-5 σrms 0.109
hK (-0.1580 ± 0.14) x 10-3 µ0 [C · m] 
     µ[D] 		 1.56(9) x 10-30 
     0.469(26) 

a The uncertainties quoted are one standard 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.

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