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 N2O4 (Dinitrogen tetroxide)

using model chemistry: B3PW91/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1Ag
Energy calculated at B3PW91/6-31G(2df,p)
 hartrees
Energy at 0K-410.050725
Energy at 298.15K 
HF Energy-410.050725
Nuclear repulsion energy238.753647
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 B3PW91/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 1478 1421 0.00 17.11 0.43 0.60
2 Ag 855 822 0.00 14.97 0.11 0.19
3 Ag 311 299 0.00 29.77 0.30 0.46
4 Au 95 92 0.00 0.00 0.00 0.00
5 B1u 1348 1296 414.66 0.00 0.00 0.00
6 B1u 771 742 223.65 0.00 0.00 0.00
7 B2g 731 703 0.00 0.13 0.75 0.86
8 B2u 1894 1821 618.36 0.00 0.00 0.00
9 B2u 238 229 0.14 0.00 0.00 0.00
10 B3g 1864 1792 0.00 5.63 0.75 0.86
11 B3g 518 498 0.00 8.16 0.75 0.86
12 B3u 457 440 16.65 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 5280.6 cm-1
Scaled (by 0.9614) Zero Point Vibrational Energy (zpe) 5076.8 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 B3PW91/6-31G(2df,p)
ABC
0.21977 0.12463 0.07953

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G(2df,p)

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 0.878
N2 0.000 0.000 -0.878
O3 0.000 1.095 1.333
O4 0.000 -1.095 1.333
O5 0.000 1.095 -1.333
O6 0.000 -1.095 -1.333

Atom - Atom Distances (Å)
  N1 N2 O3 O4 O5 O6
N11.75581.18571.18572.46712.4671
N21.75582.46712.46711.18571.1857
O31.18572.46712.18992.66593.4500
O41.18572.46712.18993.45002.6659
O52.46711.18572.66593.45002.1899
O62.46711.18573.45002.66592.1899

picture of Dinitrogen tetroxide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 N2 O5 112.568 N1 N2 O6 112.568
N2 N1 O3 112.568 N2 N1 O4 112.568
O3 N1 O4 134.865 O5 N2 O6 134.865
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N 0.599      
2 N 0.599      
3 O -0.300      
4 O -0.300      
5 O -0.300      
6 O -0.300      


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


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.647 0.000 0.000
y 0.000 -34.960 0.000
z 0.000 0.000 -33.161
Traceless
 xyz
x 5.413 0.000 0.000
y 0.000 -4.055 0.000
z 0.000 0.000 -1.358
Polar
3z2-r2-2.715
x2-y26.312
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.485 0.000 0.000
y 0.000 6.180 0.000
z 0.000 0.000 6.526


<r2> (average value of r2) Å2
<r2> 126.156
(<r2>)1/2 11.232