Open Access

Table A.1

Spectroscopic information of the selected transitions of methyl acetate detected toward G+0.693, shown in Figure 2.

Frequency (GHz) Transitiona Sgμ2g log I at 300 K (nm2 MHz) Eup (K) Blending
32.797604 (2) 63, 3–62, 4 (E3) 8.19 –7.0096 12.2 Unblended
32.840814 (2) 63, 3–62, 4 (E1) 8.20 –7.0081 12.2 Slightly blended: U-line
34.628602 (2) 43, 1–42, 2 (E3) 4.70 –7.1979 8.3 Unblended
34.637085 (4) 83, 6–82, 7 (E4) 9.69 –6.8957 16.9 Slightly blended: U-line
34.715239 (4) 83, 6–82, 7 (E3) 9.67 –6.8947 16.9 Unblended
35.446462 (2) 51, 5–40, 4 (E4) 9.56 –6.8672 6.7 Slightly blended: U-line
35.452045 (2) 51, 5–40, 4 (E1) 9.56 –6.8669 6.7 Unblended
35.454312 (2) 51, 5–40, 4 (E3) 9.56 –6.8667 6.7 Unblended
38.523669 (4) 93, 7–92, 8 (E1) 10.81 –6.7608 20.1 Blended: U line
38.537458 (2) 60, 6–51, 5 (E3) 11.85 –6.7036 8.6 Unblended
38.539998 (2) 60, 6–51, 5 (E1) 11.85 –6.7036 8.6 Unblended
38.543524 (2) 60, 6–51, 5 (E4) 11.85 –6.7036 8.6 Slightly blended: U-line
38.549823 (4) 93, 7–92, 8 (E3) 10.80 –6.7603 20.1 Blended: U-line
40.941899 (2) 61, 6–50, 5 (E4) 12.20 –6.6386 8.6 Slightly blended: U-line
40.945609 (2) 61, 6–50, 5 (E1) 12.20 –6.6385 8.6 Unblended
40.946537 (2) 61, 6–50, 5 (E3) 12.20 –6.6384 8.6 Unblended
41.235605 (2) 61, 6–50, 5 (E2) 12.29 –6.6266 7.0 Unblended
41.237259 (2) 61, 6–50, 5 (AA) 12.29 –6.6265 7.0 Unblended
42.640369 (4) 64, 3–63, 4 (E4) 7.13 –6.8433 13.6 Slightly blended: U-line
46.805363 (2) 71, 7–60, 6 (E2) 14.97 –6.4339 9.2 Unblended
46.805610 (10) 122,10–121,11 (E3) 13.55 –6.5093 31.4 Unblended
46.806655 (2) 71, 7–60, 6 (AA) 14.97 –6.4338 9.2 Unblended
46.811991 (10) 122,10–121,11 (E4) 13.55 –6.5093 31.4 Slightly blended: U-line
46.812678 (10) 122,10–121,11 (E1) 13.55 –6.5091 31.4 Slightly blended: U-line
76.613177 (9) 120,12–121,11 (E3) 28.59 –5.7486 26.3 Slightly blended: NH2CH2CH2OH
76.613332 (9) 120,12–121,11 (E4) 28.59 –5.7486 26.3 Slightly blended: NH2CH2CH2OH
76.613594 (9) 120,12–121,11 (E1) 28.59 –5.7485 26.2 Slightly blended: NH2CH2CH2OH
83.789892 (4) 54, 1–43, 2 (AA) 9.26 –6.1373 10.4 Slightly blended: C2H5OCHO
88.939251 (15) 140,14–131,13 (E3) 34.01 –5.5552 34.5 Blended: t-C2H3CHO
88.939307 (15) 140,14–131,13 (E4) 34.01 –5.5552 34.5 Blended: t-C2H3CHO
88.939623 (15) 140,14–131,13 (E1) 34.01 –5.5551 34.5 Blended: t-C2H3CHO
88.953729 (15) 141,14–130,13 (E3) 34.01 –5.5550 34.5 Unblended
88.953732 (15) 141,14–130,13 (E4) 34.01 –5.5550 34.5 Unblended
88.954100 (15) 141,14–130,13 (E1) 34.01 –5.5550 34.5 Unblended
94.160620 (5) 74, 4–63, 4 (E1) 9.13 –6.0496 16.0 Unblended
94.166317 (5) 74, 4–63, 4 (E3) 9.13 –6.0495 16.1 Unblended
94.313817 (14) 141,13–132,12 (E3) 26.70 –5.6141 37.9 Slightly blended: CH313CH2OH
94.314988 (14) 141,13–132,12 (E4) 26.70 –5.6141 37.9 Slightly blended: CH313CH2OH
94.315443 (14) 141,13–132,12 (E1) 26.70 –5.6141 37.9 Slightly blended: CH313CH2OH
95.078847 (16) 142,13–131,12 (E2) 26.65 –5.6057 36.4 Slightly blended: HCOCH2OH
95.080895 (16) 142,13–131,12 (AA) 26.65 –5.6057 36.4 Unblended
95.095381 (18) 150,15–141,14 (E3) 36.71 –5.4702 39.1 Unblended
95.095417 (18) 150,15–141,14 (E4) 36.71 –5.4702 39.1 Unblended
95.095735 (18) 150,15–141,14 (E1) 36.71 –5.4702 39.1 Unblended
95.102484 (18) 151,15–140,14 (E3) 36.71 –5.4701 39.1 Unblended
95.102496 (18) 151,15–140,14 (E4) 36.71 –5.4702 39.1 Unblended
95.102840 (18) 151,15–140,14 (E1) 36.71 –5.4701 39.1 Unblended
98.823558 (5) 74, 3–63, 3 (E1) 9.40 –5.9965 17.0 Slightly blended: CH3COCH3
98.826693 (4) 74, 3–63, 3 (E4) 9.40 –5.9965 17.0 Slightly blended: CH3COCH3
101.249746 (22) 160,16–151,15 (E3) 39.41 –5.3917 43.9 Slightly blended: C2H5SH
101.249772 (22) 160,16–151,15 (E4) 39.41 –5.3917 43.9 Slightly blended: C2H5SH
101.250085 (22) 160,16–151,15 (E1) 39.41 –5.3917 43.9 Slightly blended: C2H5SH
101.253205 (22) 161,16–150,15 (E3) 39.41 –5.3917 43.9 Slightly blended: C2H5SH
101.253219 (22) 161,16–150,15 (E4) 39.41 –5.3917 43.9 Slightly blended: C2H5SH
101.253545 (22) 161,16–150,15 (E1) 39.41 –5.3917 43.9 Slightly blended: C2H5SH

Notes. (a)The AA, E1, E2 and E3 and E4 labels refer to the different symmetry or torsional substates, arising from the presence of two non-equivalent CH3 internal rotation motions. Numbers in parentheses represent the predicted uncertainty associated to the last digits. We denote as U-line the line blending with a yet unidentified feature, and as “unblended” lines those that are not contaminated by other species, although many transitions belonging to different symmetry substates are partially or fully coalesced (auto-blended).

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