SF₂

Rotational and Centrifugal Distortion Constants for ³²S¹⁹F₂

Watson's Determinable Parameters	Value a [MHz]	Derived Parameters (assuming planarity conditions)	Value [MHz]	Ref.
A″	26 950.5017(45)	A′	26 930.486(4)	73035
B″	9 212.047 34(229)	B′	9 212.068(2)
C″	6 845.874 52(120)	C′	6 845.934(1)
τ1	0.128 605(615)	τ′bbcc	-0.031 46(8)
τ2	0.008 0540(1504)	τ′ccaa	0.041 33(47)
τ3 b	0.3720(17)	τ′aabb	0.118 74(49)
τaaaa	-1.221 848(481)	τaabb (1)	0. 2179(8)
τbbbb	-0.082 3413(730)	τaabb (2)	0. 2117(10)
τcccc	-0.015 201(78)	τaabb (3)
HJ	(0.360 44 � 0.14) � 10-6	τabab (1)	-0.0495(6)
HJK	(0.6525 � 1.4) � 10-6	τabab (2)	-0.0445(10)
HKJ	(0.1908 � 0.25) � 10-5	τabab (3)	-0.0433(14)
HK	(0.154 53 � 0.017) � 10-4
hJ c	-(0.3162 � 0.21) � 10-7	Δτ	-0.42(14) � 10-3
hJK	(0.530 51 � 0.18) � 10-5
hK	-(0.8503 � 0.74) � 10-5
Rms. Dev.	0.078
No. lines fit	75

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 deviation. 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.

 

Rotational Constants and Electric Dipole Moment for SF₂.

Parameter	(0, 0, 0)a		(0, 1, 0) b	(0, 0, 1) b
A [MHz]		26 967.13(25)	27 264.59(43)	26 780.09(43)	26 071.56(61)
B [MHz]		9167.06(6)	9188.94 (13)	9157.35(8)	9211.42(53)
C [MHz]		6830.64(6)	6819.06(11)	6801.95(8)	6789.00(49)
τaaaa		-1.68(17)	-0.945(68)	-1.26(27)
τbbbb		-0.0850 c	-0.064(7)	-0.0850 c
τaabb		0.2055 c	0.229(31)	0.2055 c
τabab		-0.0498 c	-0.062(16)	-0.0498 c
�b [C · m]      �b [D]	3.50 � 10-30       1.05 d

 

a See table above for the ground state values.   b Reference [74010].   c Fixed at the value determined for the ground state.   d Reference [69028].