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Table 2

Spin-rotation interaction, Fermi coupling, and dipole-dipole constants for HC3HCN and CH2C3N (all in MHz).

Parameter HC3HCN CH2C3N
εaa −60.5224 −660.330
εbb −5.3817 −4.2396
εcc −0.5405 −0.3955
−32.2969 −50.69 (a)
−51.3475 −50.69 (a)
6.6999 5.1618
−10.3977 −8.2149
−9.1827 −5.362

Notes. (a) The notation (Hα) and (Hβ) does not apply to CH2C3N.

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