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 NO3 (Nitrogen trioxide)

using model chemistry: MP2=FULL/6-31G**

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=FULL/6-31G**
Rotational Constants (cm-1) from geometry optimized at MP2=FULL/6-31G**
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (one short, two long)

Jump to S1C1 S1C3
Vibrational Frequencies calculated at MP2=FULL/6-31G**
Rotational Constants (cm-1) from geometry optimized at MP2=FULL/6-31G**
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (one long, two short)

Jump to S1C1 S1C2
Energy calculated at MP2=FULL/6-31G**
 hartrees
Energy at 0K-279.504468
Energy at 298.15K-279.506576
HF Energy-278.807193
Nuclear repulsion energy116.346733
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=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 1362 1273 146.00      
2 A1 901 842 85.23      
3 A1 621 580 0.01      
4 B1 743 694 11.53      
5 B2 1906 1781 188.65      
6 B2 425 397 9.31      

Unscaled Zero Point Vibrational Energy (zpe) 2979.1 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 2783.7 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=FULL/6-31G**
ABC
0.44814 0.42369 0.21779

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -0.109
O2 0.000 0.000 1.280
O3 0.000 1.115 -0.592
O4 0.000 -1.115 -0.592

Atom - Atom Distances (Å)
  N1 O2 O3 O4
N11.38941.21551.2155
O21.38942.17972.1797
O31.21552.17972.2305
O41.21552.17972.2305

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 113.435 O2 N1 O4 113.435
O3 N1 O4 133.131
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability