H2NCO
Aminooxomethyl, Carbamoyl, 2A'
Species tag 044521
Version1*
Date of EntryAug. 2025
ContributorH. S. P. Müller

The experimental data were taken from
(1) M.-A. Martin-Drumel, A. Coutens, J.-C. Loison, J. K. Jørgensen, and O. Pirali, 2024, Astron. Astrophys. 687, Art. No. A233.
The calculation should be sufficiently accurate for astronomical observations. Transitions with calculated uncertainties exceeding 0.1 MHz should be viewed with some caution. This applies in particular to the weaker b-type lines with Ka = 2 and higher.
Fine structure as well as hyperfine structure caused by the 14N and each of the inequivalent H may be resolvable in astronomical observations. A separate calculation with 5 quantum numbers is also provided; besides the common rotational quanta, these are an aggregate spin number and F.
The dipole moment components are from a quantum chemical calculation in (1).

Lines Listed54236
Frequency / GHz< 1000
Max. J48
log STR0-7.5
log STR1-6.0
Isotope Corr. 
Egy / (cm–1)0.0
 µa / D3.65
 µb / D0.61
 µc / D 
 A / MHz126265.
 B / MHz11167.74
 C / MHz10256.93
 Q(300.0)175484.5409
 Q(225.0)113907.4036
 Q(150.0)61974.2487
 Q(75.00)21916.3626
 Q(37.50)7761.8871
 Q(18.75)2755.4002
 Q(9.375)982.4629
 Q(5.000)388.6913
 Q(2.725)164.4511
detected in ISM/CSMno


Database maintained by Holger S. P. Müller and Sven Thorwirth, programming by D. Roth and F. Schlöder