return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for H2NO (nitroxide)

using model chemistry: B2PLYP=FULL/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2B1
1 2 no CS 2A'

Conformer 1 (C2V)

Jump to S1C2
Energy calculated at B2PLYP=FULL/6-31G
 hartrees
Energy at 0K-130.884219
Energy at 298.15K-130.886549
HF Energy-130.809025
Nuclear repulsion energy34.200237
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 B2PLYP=FULL/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3522 3522 7.18      
2 A1 1723 1723 18.95      
3 A1 1266 1266 0.37      
4 B1 374 374 335.55      
5 B2 3678 3678 2.67      
6 B2 1254 1254 5.80      

Unscaled Zero Point Vibrational Energy (zpe) 5907.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5907.9 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 B2PLYP=FULL/6-31G
ABC
10.86283 1.06471 0.96967

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -0.564
O2 0.000 0.000 0.760
H3 0.000 0.877 -1.066
H4 0.000 -0.877 -1.066

Atom - Atom Distances (Å)
  N1 O2 H3 H4
N11.32331.01121.0112
O21.32332.02592.0259
H31.01122.02591.7549
H41.01122.02591.7549

picture of nitroxide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O2 N1 H3 119.807 O2 N1 H4 119.807
H3 N1 H4 120.385
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at B2PLYP=FULL/6-31G
 hartrees
Energy at 0K-130.884219
Energy at 298.15K-130.886546
HF Energy-130.809028
Nuclear repulsion energy34.199383
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 B2PLYP=FULL/6-31G
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' 3524 3524 7.22      
2 A' 1722 1722 18.99      
3 A' 1266 1266 0.36      
4 A' 371 371 335.78      
5 A" 3680 3680 2.74      
6 A" 1253 1253 5.80      

Unscaled Zero Point Vibrational Energy (zpe) 5907.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5907.5 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 B2PLYP=FULL/6-31G
ABC
10.86059 1.06464 0.96960

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31G

Point Group is Cs

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability