NO2

Rotational and centrifugal distortion constants

Parameter 14N16O2 Value a
[MHz]
15N16O2 Value
[MHz]
14N16O18O Value
[MHz]
Ref.
A 239 868.7(110) 228 756.1(40) 235 802.5(150) 64008
B 13 000.12(60) 13 003.06(20) 12 264.92(80)
C 12 303.45(60) 12 274.73(20) 11 632.71(80)
τaaaa -299.4(4) -273.4(40) -284.4(40)
τbbbb -0.041 44(15) -0.041 44(15) -0.037 21(15)
τaabb 1.843(20) 1.761(20) 1.705(20)
τabab -0.2453(10) -0.2445(10) -0.2188(10)
µb [C · m]
     µb [D]
1.054(33)  10-30 
     0.316(10) b
0.981(50)  10-30 
     0.294(15) c
 

 
a See table below for constants derived from infrared and microwave spectra.
 
b Reference [63009].
 
c Reference [64009].

 

Spin-rotation and hyperfine constants for NO2

Parameters 14N16O2
Value a
[MHz]
14N16O2
υ2=1 Value b
[MHz]
15N16O2
Value a
[MHz]
14N16O18O
Value c
[MHz]
14N16O17O
Value d
[MHz]
Ref. 66026 76019 66026 64008 66025
As 5401.76(7) 5920.4(13) 5149.07(10) 5326.08(460) 5369.58(250)
Bs 7.65(2) 6.4(3) 7.70(3) 7.72(5) 8.05(260)
Cs -95.24(2) -97.1(3) -94.99(10) -90.58(6) -92.92(90)
(O)I (14N or 15N) 147.23(3) 147.0(2) -206.46(6) 146.62(60) 147.28(5)
(aa)I (14N or 15N) -22.16(7) -22.2(4) 30.89(20) -19.92(220) -21.93(14)
(cc)I (14N or 15N) -17.69(8) -18.1(4) 25.11(20) -18.85(130) -17.00(24)
(aa)Q (14N) 0.45(6) 0.45 a   1.69(120) 0.41(8)
(cc)Q (14N) 1. 26(5) 1.26 a   0.92(60) 1.33(15)
(O)I (17O)   -63.76(3)
(aa)I (17O) 50.48(8)
(cc)I (17O) 55.85(10)
(aa)Q (17O) -0.202(14)
(cc)Q (17O) -0.009(16)

a Assumed value.

b Additional references: [50018], [51014], [58004], [59010], [62003], [62004], [72042], [72043], [73049], [73065], [74008], [74016], [74017], [74018], [74019], [74020], [74023], [75015], [75016], [75027], [75028], [75029].

 

Rotational constants for 14NO2 ground state and (0,1,0) state from combined infrared and microwave spectra.

Parameters Ground State Value
[MHz]
Ref. (0,1,0) State Value
[MHz]
Ref.
script A 239 905.41(63) 76020 a 251 027.(23) 75036 b
script B 13 002.262(123) 13 000.13(234)
script C 12 304.888(66) 12 278.87(192)
ΔK 80.94(39) 101.45(183)
ΔNK -0.5903(90) -0.668(35)
ΔN 9.033(90) x 10-3 9.033(90) x 10-3
δK 0.12(5) 0.12(5)
δN 9.303(288) x 10-4 9.303(288) x 10-4
HK 0.0977(138) 0.0977(138)
HKN -7.26(165) x 10-4 -7.26(165) x 10-4
HN 1.6(18) x 10-8 1.6(18) x 10-8
LK 1.7(12) x 10-4 1.7(12) x 10-4)

a See [76020] for molecular constants for υ3=1 also.

b The change in parameters between the ground state and υ2=1 are reported. These changes are significant only for the values of script A, scriptB, scriptC, ΔK, and ΔNK when compared to the uncertainty in the ground state constants.


NIST Physical Measurement Laboratory National Institute of Standards and Technology NIST Physical Measurement Laboratory Back to the triatomic molecule selection page







































>