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Table 2

Selection of observed transition frequencies together with the corresponding residuals from the fits for the Z and E isomers of C-cyanomethanimine.

Isomer J J K a K c Obs. frequency Uncertainty Obs.-Calc.
Upper state Lower state (MHz) (MHz) (MHz)

(Z) 30 3 28 29 3 27 291 623.715 0.030 0.008
(Z) 30 5 26 29 5 25 291 640.038 0.030 –0.018
(Z) 30 5 25 29 5 24 291 646.827 0.030 –0.007
(Z) 30 4 27 29 4 26 291 842.010 0.030 –0.012
(Z) 30 4 26 29 4 25 292 014.364 0.030 –0.051
(E) 42 2 41 42 1 42 345 022.426 0.030 –0.006
(E) 36 5 31 35 5 30 345 027.550 0.040 0.008
(E) 36 9 27 35 9 26 345 039.468 0.040 0.000(a)
(E) 36 9 28 35 9 27 345 039.468 0.040 0.000(a)
(E) 37 0 37 36 0 36 345 190.487 0.040 0.006

Notes.

(a)

Blended transitions: relative weight 0.5.

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