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Experimental data for NH2OH (hydroxylamine)

22 02 02 11 45
Other names
Oxammonium; hydroxylamine;
INChI INChIKey SMILES IUPAC name
InChI=1S/H3NO/c1-2/h2H,1H2 AVXURJPOCDRRFD-UHFFFAOYSA-N NO hydroxylamine
State Conformation
1A' CS
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Hfg(298.15K) enthalpy of formation -50.00 10.00 kJ mol-1 Gurvich
Hfg(0K) enthalpy of formation -39.86 10.00 kJ mol-1 Gurvich
Entropy (298.15K) entropy 236.18   J K-1 mol-1 Gurvich
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 11.24   kJ mol-1 Gurvich
Heat Capacity (298.15K) heat capacity 46.47   J K-1 mol-1 Gurvich
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency Intensity Comment Description
Fundamental(cm-1) Harmonic(cm-1) Reference (km mol-1) unc. Reference
1 A' 3650   1997Luc:8409      
2 A' 3294   1997Luc:8409      
3 A' 1605   1997Luc:8409      
4 A' 1353   1997Luc:8409      
5 A' 1115   1997Luc:8409      
6 A' 895   1997Luc:8409      
7 A" 3359   1997Luc:8409      
8 A" 1295   1997Luc:8409      
9 A" 386   Shim      

vibrational zero-point energy: 8475.9 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for NH2OH (hydroxylamine).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
6.37031 0.84124 0.83911 1972Tsu:167-174

Calculated rotational constants for NH2OH (hydroxylamine).
Product of moments of inertia moments of inertia
1065.353amu3Å6   4.87822335919189E-117gm3 cm6
Geometric Data
picture of hydroxylamine

Point Group Cs


Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees
Description Value unc. Connectivity Reference Comment
Atom 1 Atom 2 Atom 3 Atom 4
rOH 0.962   2 3 1972Tsu:167-174
rNH 1.016   1 4 1972Tsu:167-174
rNO 1.453   1 2 1972Tsu:167-174
aHON 101.37 1 2 3 1972Tsu:167-174
aHNO 107.01 2 1 4 1972Tsu:167-174
aHNH 103.25 4 1 5 1972Tsu:167-174

Cartesians
Atom x (Å) y (Å) z (Å)
N1 -0.0094 0.7040 0.0000
O2 -0.0094 -0.7490 0.0000
H3 -0.9525 -0.9386 0.0000
H4 0.5469 1.0012 0.7965
H5 0.5469 1.0012 -0.7965

Atom - Atom Distances bond lengths
Distances in Å
  N1 O2 H3 H4 H5
N1   1.45301.89411.01601.0160
O2 1.4530   0.96202.00182.0018
H3 1.89410.9620   2.57802.5780
H4 1.01602.00182.5780   1.5930
H5 1.01602.00182.57801.5930  

Calculated geometries for NH2OH (hydroxylamine). An error occurred on the server when processing the URL. Please contact the system administrator.

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