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Table 1

Selected observed transition frequencies of hydantoin in its ground and excited vibrational states around 130 GHz.

Ground state Excited state 1 Excited state 2

Frequency obs. calc. Frequency obs. calc. Frequency obs. calc.

360 36 ← 351 35 125 242.840(30)a 0.012 125 452.478(30) 0.005 125 416.183(30) 0.004
361 36 ← 350 35
351 34 ← 342 33 12 5145.367(30) 0.009 125 338.912(30) 0.006 125 304..957(30) 0.011
352 34 ← 342 33
342 32 ← 333 31 125 066.061(30) 0.030 12 5243. 414(30) 0.061 125 211.761(30) 0.028
343 32 ← 332 31 125 066.423(30) 0.045 12 5243.640(30) 0.042 125 212.140(30) 0.072
333 30 ← 324 29 125 027.012(30) 0.030 12 5187.891(30) 0.005 125 158.646(30) 0.001
334 30 ← 323 29 125 024.476(30) 0.020 12 5202.643(30) 0.004 125 173.614(30) 0.014

370 37 ← 361 36 128 675.048(30) 0.010 128 890..609(30) 0.004 128 853.294(30) 0.003
371 37 ← 360 36
361 35 ← 352 34 128 577.240(30) 0.069 128 776..727(30) 0.037 128 741.668(30) 0.020
362 35 ← 352 34
352 33 ← 343 32 128 496.290(30) 0.016 128 679..576(30) 0.011 128 646.973(30) 0.060
353 33 ← 342 32
343 31 ← 334 30 128 454.243(30) 0.009 128 621.017(30) 0.052 128 590.816(30) 0.005
344 31 ← 333 30 128 463.123(30) 0.018 128 629.520(30) 0.028 128 599.358(30) 0.015

380 38 ← 371 37 132 107.167(30) 0.020 132 328..734(30) 0.020 132 290.337(30) 0.032
381 38 ← 370 37
371 36 ← 362 35 132 009.008(30) 0.027 132 214..458(30) 0.000 132 178.451(30) 0.026
372 36 ← 362 35
362 34 ← 353 33 131 926.523(30) 0.000 132 115..805(30) 0.016 132 082.136(30) 0.035
363 34 ← 352 33
353 32 ← 344 31 131 881.030(30) 0.031 132 053.875(30) 0.048 132 022.529(30) 0.017
354 32 ← 343 31 131 886.048(30) 0.050 132 058.577(30) 0.033 132 027.425(30) 0.014

390 39 ← 381 38 135 539.317(30) 0.019 135 766.763(30) 0.014 135 727.337(30) 0.039
391 39 ← 380 38
381 37 ← 372 36 135 440.818(30) 0.034 135 652.199(30) 0.018 135 615.154(30) 0.002
382 37 ← 372 36
372 35 ← 363 34 135 356.938(30) 0.018 135 552.160(30) 0.001 135 517.445(30) 0.009
373 35 ← 362 34
363 33 ← 354 32 135 307.830(30) 0.012 135 486.609(30) 0.028 135 454.219(30) 0.049
364 33 ← 353 32 135 310.636(30) 0.055 135 489.257(30) 0.025 135 456.952(30) 0.065

Notes. Hyperfine splitting due to the nitrogen nucleus was not resolved. Units are in MHz.

(a)

Experimental frequency accuracy in the present study.

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