Open Access

Table A.5

Spectroscopic information of the transitions of lactaldehyde detected toward G+0.693-0.027, shown in Figure 5.

Frequency
(GHz)
Transition(a) log I (300 K)
(nm2 MHz)
Eup
(K)
Blending
32.8030391 (7) 50,5–41,4 −5.8204 5.0 Unblended
34.8797382 (13) 94,6–93,7 −5.6662 19.7 Blended: aGg'-(CH2OH)2 *
34.9104833 (7) 51,5–40,4 −5.7505 5.1 Blended: U-line *
39.6056410 (8) 60,6–51,5 −5.5481 7.0 Unblended
39.8461672 (16) 95,4–94,5 −5.5811 21.7 Slightly blended: U-line *
40.7250108 (8) 61,6–50,5 −5.5188 7.0 Unblended
46.1743922 (9) 70,7–61,6 −5.3312 9.2 Blended: 13CH2CHCN
85.7293506 (14) 74,3–63,4 −5.0545 13.6 Unblended *
101.649525 (50) 85,4–54,3 −4.7871 18.4 Blended: C2H3CN *
103.911545 (50) 76,2–65,1 −4.6700 18.0 Blended: N-CH3NHCHO
103.9116165 (19) 76,1–65,1 −5.3245 18.0 Blended: N-CH3NHCHO
103.9130904 (19) 76,2–65,2 −5.3245 18.0 Blended: N-CH3NHCHO
103.913219 (50) 76,1–65,2 −4.6700 18.0 Blended: N-CH3NHCHO
137.629993 (50) 98,2–87,1 −4.3056 30.3 Blended: CH3C(O)OCH3
137.629993 (50) 98,1–87,1 −4.9688 30.3 Blended: CH3C(O)OCH3
137.629993 (50) 98,2–87,2 −4.9688 30.3 Blended: CH3C(O)OCH3
137.629993 (50) 98,1–87,2 −4.3056 30.3 Blended: CH3C(O)OCH3

Notes. (a)The rotational energy levels are labeled using the conventional notation for asymmetric tops: JKa,Kc. Numbers in parentheses represent the predicted uncertainty associated to the last digits. Transitions that were not used in the AUTOFIT owing to a non-negligible contamination with a U-line or a lower S/N ratio are flagged with an asterisk (*).

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