SeO₂

Rotational and centrifugal distortion constants for ⁸⁰SeO₂ and ⁷⁸SeO₂ in the vibrational state

Watson's Determinable Parameters	80SeO2 a [MHz]	78SeO2 a [MHz]
A″	28 826.381(92)	29 037.626(105)
B″	8676.6008(284)	8676.4604(382)
C″	6651.8491(266)	6663.0034(323)
τ1	0.111 01(2149)	0.170 91(3596)
τ2	0.008 619(4323)	0.020 37(744)
τ3 b	0.10(6)	-0.05(10)
τaaaa	-2.2166(133)	-2.2107(217)
τbbbb	-0.047 283(2327)	-0.041 080(3764)
τcccc	-0.9664(1244) × 10-2	-0.578(178) × 10-2
Std. dev.	0.244	0. 265
No. lines fit	26	23
µb [C · m]      µb [D]	8.74(17) × 10-30       2.62(5) c
Derived Parameters  (assuming planarity conditions)
A′	28 826.373(92)	29 037.620(105)
B′	8676.603(27)	8676.469(35)
C′	6651.910(28)	6663.086(32)
τ′bbcc	-0.0166(17)	-0.0121(31)
τ′ccaa	0.49(48) × 10-2	0.018(11)
τ′aabb	0.123(15)	0.165(23)
τaabb(1)	0.2106(69)	0.229(17)
τaabb(2)	0.2088(79)	0.2365(90)
τaabb(3)	0.2088(79)	0.2365(90)
τabab(1)	-0.0440(44)	-0.0322(54)
τabab(2)	-0.0424(71)	-0.038(13)
τabab(3)	-0.0421(79)	-0.039(16)
Δτ	-0.12(37) × 10-3	0.45(93) × 10-3

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. b Reference [72044]

Rotational constants for SeO₂

Isotopic Species	Vib. State υ1 υ2 υ3	A [MHz]	B [MHz]	C [MHz]	Ref.
82Se16O2	0   0   0	28 624.76	8676.47	6640.98	70035
80Se16O2 a	1   0   0	28 763.70(72)	8640.26(18)	6623.25(27)
	0   1   0	29 261.86(57)	8677.27(18)	6638.58(12)
	0   2   0	29 712.50(80)	8677.63(40)	6625.06(40)
	0   0   1	28 651.43(80)	8649.49(30)	6631.49(30)
78Se16O2 a	1   0   0	28 975.47	8640.09	6634.24
	0   1   0	29 477.03	8677.11	6649.60
	0   0   1	28 858. 47	8649.33	6642.26
77Se16O2	0   0   0	29 146.70	8676.38	6668.68
76Se16O2	0   0   0	29 260.12	8676.42	6674.17

^a See table above for the ground state constants for these species.