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: PBEPBE/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1Ag
Energy calculated at PBEPBE/6-31G**
 hartrees
Energy at 0K-409.817238
Energy at 298.15K 
HF Energy-409.817238
Nuclear repulsion energy232.335490
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 PBEPBE/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 Ag 1424 1404 0.00 14.40 0.25 0.40
2 Ag 811 800 0.00 9.59 0.12 0.21
3 Ag 266 262 0.00 26.80 0.30 0.46
4 Au 94 93 0.00 0.00 0.00 0.00
5 B1u 1286 1268 414.87 0.00 0.00 0.00
6 B1u 725 715 217.37 0.00 0.00 0.00
7 B2g 623 614 0.00 0.15 0.75 0.86
8 B2u 1807 1783 476.85 0.00 0.00 0.00
9 B2u 191 188 0.21 0.00 0.00 0.00
10 B3g 1784 1760 0.00 9.86 0.75 0.86
11 B3g 460 454 0.00 9.33 0.75 0.86
12 B3u 389 384 10.23 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 4929.0 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 4861.5 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 PBEPBE/6-31G**
ABC
0.21213 0.11482 0.07450

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 0.923
N2 0.000 0.000 -0.923
O3 0.000 1.114 1.386
O4 0.000 -1.114 1.386
O5 0.000 1.114 -1.386
O6 0.000 -1.114 -1.386

Atom - Atom Distances (Å)
  N1 N2 O3 O4 O5 O6
N11.84541.20711.20712.56402.5640
N21.84542.56402.56401.20711.2071
O31.20712.56402.22902.77283.5577
O41.20712.56402.22903.55772.7728
O52.56401.20712.77283.55772.2290
O62.56401.20713.55772.77282.2290

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 112.592 N1 N2 O6 112.592
N2 N1 O3 112.592 N2 N1 O4 112.592
O3 N1 O4 134.815 O5 N2 O6 134.815
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N 0.527      
2 N 0.527      
3 O -0.264      
4 O -0.264      
5 O -0.264      
6 O -0.264      


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 -28.987 0.000 0.000
y 0.000 -34.986 0.000
z 0.000 0.000 -33.000
Traceless
 xyz
x 5.006 0.000 0.000
y 0.000 -3.993 0.000
z 0.000 0.000 -1.013
Polar
3z2-r2-2.027
x2-y25.999
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.968 0.000 0.000
y 0.000 6.284 0.000
z 0.000 0.000 6.796


<r2> (average value of r2) Å2
<r2> 133.364
(<r2>)1/2 11.548