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All results from a given calculation for NO3 (Nitrogen trioxide)

using model chemistry: MP2/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 3 yes one long, two short 2B2

Conformer 1 (all bonds equal)

Jump to S1C2 S1C3
Vibrational Frequencies calculated at MP2/CEP-121G*
Rotational Constants (cm-1) from geometry optimized at MP2/CEP-121G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (one short, two long)

Jump to S1C1 S1C3
Vibrational Frequencies calculated at MP2/CEP-121G*
Rotational Constants (cm-1) from geometry optimized at MP2/CEP-121G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (one long, two short)

Jump to S1C1 S1C2
Energy calculated at MP2/CEP-121G*
 hartrees
Energy at 0K-57.253191
Energy at 298.15K-57.255280
HF Energy-56.550844
Nuclear repulsion energy62.884534
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 MP2/CEP-121G*
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 1329 1266 162.59      
2 A1 901 858 79.42      
3 A1 613 584 0.07      
4 B1 701 667 6.55      
5 B2 1854 1767 220.98      
6 B2 430 410 9.87      

Unscaled Zero Point Vibrational Energy (zpe) 2913.6 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 2776.0 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 MP2/CEP-121G*
ABC
0.43820 0.41504 0.21315

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -0.108
O2 0.000 0.000 1.294
O3 0.000 1.127 -0.600
O4 0.000 -1.127 -0.600

Atom - Atom Distances (Å)
  N1 O2 O3 O4
N11.40171.22971.2297
O21.40172.20402.2040
O31.22972.20402.2536
O41.22972.20402.2536

picture of Nitrogen trioxide state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O2 N1 O3 113.609 O2 N1 O4 113.609
O3 N1 O4 132.783
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability