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All results from a given calculation for N2O4 (Dinitrogen tetroxide)

using model chemistry: B3LYP/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1Ag
Energy calculated at B3LYP/CEP-31G
 hartrees
Energy at 0K-83.333040
Energy at 298.15K 
HF Energy-83.333040
Nuclear repulsion energy123.550848
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 B3LYP/CEP-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 Ag 1277 1237 0.00 18.48 0.49 0.66
2 Ag 749 725 0.00 14.85 0.12 0.22
3 Ag 296 287 0.00 43.34 0.34 0.51
4 Au 79 77 0.00 0.00 0.00 0.00
5 B1u 1200 1162 357.77 0.00 0.00 0.00
6 B1u 688 667 170.92 0.00 0.00 0.00
7 B2g 596 577 0.00 1.31 0.75 0.86
8 B2u 1611 1561 389.78 0.00 0.00 0.00
9 B2u 220 213 0.19 0.00 0.00 0.00
10 B3g 1591 1541 0.00 12.69 0.75 0.86
11 B3g 454 440 0.00 12.59 0.75 0.86
12 B3u 398 386 5.52 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 4579.5 cm-1
Scaled (by 0.9684) Zero Point Vibrational Energy (zpe) 4434.8 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 B3LYP/CEP-31G
ABC
0.19847 0.11504 0.07283

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 0.897
N2 0.000 0.000 -0.897
O3 0.000 1.152 1.392
O4 0.000 -1.152 1.392
O5 0.000 1.152 -1.392
O6 0.000 -1.152 -1.392

Atom - Atom Distances (Å)
  N1 N2 O3 O4 O5 O6
N11.79471.25391.25392.56302.5630
N21.79472.56302.56301.25391.2539
O31.25392.56302.30442.78413.6141
O41.25392.56302.30443.61412.7841
O52.56301.25392.78413.61412.3044
O62.56301.25393.61412.78412.3044

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 113.237 N1 N2 O6 113.237
N2 N1 O3 113.237 N2 N1 O4 113.237
O3 N1 O4 133.525 O5 N2 O6 133.525
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.035      
2 N -0.035      
3 O 0.017      
4 O 0.017      
5 O 0.017      
6 O 0.017      


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 -29.758 0.000 0.000
y 0.000 -38.027 0.000
z 0.000 0.000 -34.974
Traceless
 xyz
x 6.742 0.000 0.000
y 0.000 -5.661 0.000
z 0.000 0.000 -1.082
Polar
3z2-r2-2.163
x2-y28.269
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.608 0.000 0.000
y 0.000 7.327 0.000
z 0.000 0.000 7.157


<r2> (average value of r2) Å2
<r2> 107.815
(<r2>)1/2 10.383