return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for NH2OH (hydroxylamine)

using model chemistry: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-130.938953
Energy at 298.15K 
HF Energy-130.938953
Nuclear repulsion energy38.115187
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at mPW1PW91/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3543 3364 7.02 77.78 0.35 0.51
2 A' 3333 3165 1.89 114.69 0.13 0.24
3 A' 1710 1624 16.68 16.16 0.54 0.70
4 A' 1401 1330 24.51 9.16 0.72 0.84
5 A' 1126 1069 137.13 3.90 0.73 0.84
6 A' 938 890 16.59 15.38 0.12 0.21
7 A" 3439 3266 4.66 63.17 0.75 0.86
8 A" 1285 1220 0.00 13.31 0.75 0.86
9 A" 410 389 232.73 10.24 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8591.6 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 8158.5 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at mPW1PW91/3-21G*
ABC
6.08302 0.79452 0.79379

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.010 0.735 0.000
O2 -0.010 -0.764 0.000
H3 -0.985 -0.941 0.000
H4 0.565 0.956 0.826
H5 0.565 0.956 -0.826

Atom - Atom Distances (Å)
  N1 O2 H3 H4 H5
N11.49911.93861.03051.0305
O21.49910.99121.99351.9935
H31.93860.99122.58542.5854
H41.03051.99352.58541.6524
H51.03051.99352.58541.6524

picture of hydroxylamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 O2 H3 100.242 O2 N1 H4 102.428
O2 N1 H5 102.428 H4 N1 H5 106.596
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.499      
2 O -0.481      
3 H 0.373      
4 H 0.304      
5 H 0.304      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.217 0.643 0.000 0.679
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.481 4.115 0.000
y 4.115 -12.212 0.000
z 0.000 0.000 -11.029
Traceless
 xyz
x 1.139 4.115 0.000
y 4.115 -1.458 0.000
z 0.000 0.000 0.318
Polar
3z2-r20.636
x2-y21.731
xy4.115
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.420 0.572 0.000
y 0.572 2.067 0.000
z 0.000 0.000 1.300


<r2> (average value of r2) Å2
<r2> 21.164
(<r2>)1/2 4.600