Rotational spectra of isotopic species of methyl cyanide, CH3CN, in their ground vibrational states up to terahertz frequencies

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Volume 506 / No 3 (November II 2009)

A&A, 506 3 (2009) 1487-1499

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Table 1:

Lower state quantum numbers of rotational transitions^a of CH₃CN from present work, frequencies (MHz), uncertainties unc. (kHz), and residuals o-c (kHz) between observed frequencies and those calculated from the final set of spectroscopic parameters.
J''	K''	Frequency	unc.	o-c
86	15	1584230.365	150	-155
86	14	1585042.686	100	39
86	13	1585800.110	100	4
86	12	1586502.584	50	-32
86	11	1587149.953	50	35
86	10	1587741.807	50	39
86	9	1588277.964	50	22
86	8	1588758.221	50	-15
86	7	1589182.509	50	44
86	6	1589550.454	50	-11
86	5	1589862.092	50	-2
86	4	1590117.262	50	32
86	3	1590315.822	50	50
86	2	1590457.643	50	-1
86	1	1590542.824	50	34
86	0	1590571.147	50	-28
87	9	1606303.437	100	75
87	8	1606788.347	50	71
87	7	1607216.562	50	-25
87	6	1607588.178	50	50
87	5	1607902.790	50	35
87	4	1608160.351	50	6
87	3	1608360.834	50	36
87	2	1608504.060	50	25
87	1	1608590.002	50	3
87	0	1608618.661	50	3
88	10	1623774.391	50	9
88	9	1624320.812	50	-33
88	8	1624810.328	50	-27
88	7	1625242.737	50	13
88	6	1625617.728	50	-56
88	5	1625935.334	50	-57
88	4	1626195.369	50	-52
88	3	1626397.725	50	-47
88	2	1626542.355	50	-11
88	1	1626629.131	50	-14
88	0	1626658.067	50	-7

^a Transitions are $J'' +1, K'' \leftarrow J'', K''$ for all isotopologs except for CH₂DCN.

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