H₂Se

Rotational and centrifugal distortion constants
for H₂⁷⁸Se and H₂⁸⁰Se

Parameters	H278Se [MHz]	H280Se [MHz]	Ref.
	244 259.14(119)	244 099.89(29)	75026
	232 558.27(119)	232 561.95(29)
	116 910.11(514)	116 874.93(176)
A	245 122.14	244 967.32
B	231 593.37	231 593.31
C	117 012.00	116 976.14
ΔJ	35.042(100)	34.950(30)
ΔJK	-118.184(150)	-118.189(70)
ΔK	87.908(300)	88.1873(1300)
δJ	-2.114 91(1800)	-2.120 91(1200)
δK	458.9872 ± 3.	461.0394 ± 1.
HJ	0.0198(40)	0.0217(14)
HJK	-1.137 58 ± 0.03	-1.201 93 ± 0.013
HKJ	2.4996 ± 0.2	2.7535 ± 0.06
HK	-0.8681 ± 0.2	-1.1067 ± 0.06
hJ	(-0.596 80 ± 0.02) × 10-2	(-0.626 116 ± 0.012) × 10-2
hJK	0.207 64 ± 0.01	0.202 17 ± 0.007
hK	8.451 90 ± 0.4	8.276 58 ± 0.12
LJJK	(0.181 22 ± 0.017) × 10-2	(0.174 30 ± 0.004) × 10-2
LJK	0.135 773 ± 0.008	0.135 488 ± 0.002
LKKJ	-0.365 455 ± 0.017	-0.366 685 ± 0.005
LK	0.218 064 ± 0.009	0.221 558 ± 0.002
ℓJK	(0.987 99 ± 0.2) × 10-3	(0.892 45 ± 0.06) × 10-3
ℓK	(0.8493 ± 0.17) × 10-2	(0.6860 ± 0.12) × 10-2
PJK	(-0.2258 ± 0.27) × 10-4	(-0.436 99 ± 0.07) × 10-4
PKJ	(-0.248 166 ± 0.02) × 10-2	(-0.226 800 ± 0.01) × 10-2
PKKJ	(0.647 661 ± 0.06) × 10-2	(0.604 766 ± 0.02) × 10-2
PK	(-0.396 067 ± 0.04) × 10-2	(-0.373 530 ± 0.013) × 10-2
Std. dev. MW	0.07	0.14
Std. dev. IR	387.59	354.76

Rotational and centrifugal distortion constants
for H₂⁷⁶Se, H₂⁷⁷Se, and H₂⁸²Se

Parameters	H276Se [MHz]	H277Se [MHz]	H282Se [MHz]	Ref.
	244 434.91	244 348.74	243 945.78	75026 a
	232 546.40	232 549.75	232 568.92
	116 945.72	116 927.29	116 841.45
ΔJ	35.146	35.122	34.906
ΔJK	-118.341	-118.408	118.264
ΔK	86.5614	87.0799	88.9171
δJ	-2.154 31	-2.148 38	-2.109 03
δK	452.4169	454.1929	464.5726
HJK	-1.148 09	-1.169 93	-1.238 63
HKJ	2.5035	2.5778	2.886 24
hJ	-0.006 105 82	-0.006 170 29	-0.006 361 21
hJK	0.200 83	0.198 72	0.199 16
hK	8.147 09	8.128 89	8.274 15
Std. dev. MV	0.390	0.438	0.141

^a The distortion constants not shown in this table were fixed at their H₂⁸⁰Se values in table H₂S.

^a The τ's were derived from the vibrational frequencies.

HDSe

Rotational and centrifugal distortion constants

Parameters	HD76Se	HD77Se	HD78Se	HD80Se	HD82Se	Ref.
(A-C)/2 [MHz]	79 830	79 812	79 808	79 785	79 772	59006
δJ [Hz]	3.56	4.10	3.64	3.85	3.10
DJK [kHz]	0.229	0.224	0.212	0.217	0.215
R6 [Hz]	0.308	0.275	0.288	0.272	0.299
DK [kHz]	-0.371	-0.357	-0.358	-0.338	-0.372
R5 [kHz]	-0.0571	-0.0587	-0.0575	-0.0600	-0.0543

HD⁸⁰Se

Hyperfine constants and electric dipole moment

Parameters	Molecular Value	432 Level	431 Level	221 Level	220 Level	Ref.
Ref.		72035	72035	67014	67014
eQqJ (D) [kHz]		15.69(26)	14.23(21)	35.04(12)	34.69(13)
cJ (H) [kHz] a		-18.53(27)	-17.97(27)	-26.94(6)	-25.74(6)
cJ (D) [kHz] a		-1.05(2)	-1.13(3)	-0.43	-0.48
χaa (D) [kHz]	123.3(6)					72035
χbb (D) [kHz]	-56.5(60)
χcc (D) [kHz]	-66.8(71)
µb HDSe [C · m]      µb HD80Se [D]	2.07 × 10-30       0.62					59006
µb D280Se [C · m]      µb D280Se [D]	2.091(7) × 10-30       0.627(2)					69037

a The spin-rotation tensor elements derived in [72035] are:     for the proton Maa(H) = -38.77(10) kHz, Mbb(H) = 2.37(49) kHz, and Mcc(H) = -8.95(95) kHz;     for the deuteron Maa(D) = 0.51 kHz, Mbb(D) = -2.46(1) kHz, and Mcc(D) = -2.13(2) kHz.