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Table 2

Spectroscopic constants of CH2NH.

Experiment

Constants This worka Ref.1,b Ref.2,b

Rotational/MHz
A 0 196 210.87642(51) 196 210.87559(57) 196 210.938(12)
B 0 34 641.699332(93) 34 641.69932(15) 34 641.7112(21)
C 0 29 351.496908(85) 29 351.49688(10) 29 351.5077(19)
Quartic centrifugal distortion/kHz
D J 56.00357(53) 56.0021(56) 55.961(23)
D JK 598.6807(54) 598.639(83) 597.94(36)
D K 6383.419(38) 6383.47(20) 6384.9(10)
d 1 –9.972737(59) –9.97250(57) –9.9690(21)
d 2 –2.007853(34) –2.00805(26) –2.00717(30)
Sextic centrifugal distortion/Hz
H J 0.01676(55) 0.c –0.038(30)
H JK 2.604(12) 2.32(12) 0.99(78)
H KJ 6.118(75) 0.c 7.9(23)
H K 877.0(11) 931.(16) 859.5(66)
h 1 0.032156(91) 0.0288(15) 0.0258(36)
h 2 0.032351(62) 0.0336(15) 0.03031(90)
h 3 0.009203(47) 0.00830(41) 0.00870(10)
Octic centrifugal distortion/mHz
L K –159.8(49)
l 3 −0.558(41) × 10-3
N quadrupole coupling/MHz
χ aa –0.9147(17) –0.9148(12)
χbb − χcc –6.2478(20) –6.2477(17)
N spin-rotation/kHz
C aa 52.89(84) 52.73(64)
C bb 9.38(28) 9.45(22)
C cc 0.68(26) 0.66(20)

Notes. 

(a)

The errors reported in parentheses are in units of the last quoted digits, and standard errors of parameters can be obtained by multiplying by 0.971 (see σfit in Table 1).

(b)

Standard errors are reported in parentheses in units of the last quoted digits.

(c)

Fixed parameter in the fit.

References. 

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