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

using model chemistry: BLYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1Ag
Energy calculated at BLYP/3-21G
 hartrees
Energy at 0K-407.848764
Energy at 298.15K 
HF Energy-407.848764
Nuclear repulsion energy224.196888
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 BLYP/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Ag 1163 1156 0.00 10.53 0.18 0.31
2 Ag 739 735 0.00 10.27 0.16 0.27
3 Ag 270 268 0.00 22.78 0.32 0.49
4 Au 97 96 0.00 0.00 0.00 0.00
5 B1u 1018 1012 322.69 0.00 0.00 0.00
6 B1u 649 646 142.57 0.00 0.00 0.00
7 B2g 545 542 0.00 0.10 0.75 0.86
8 B2u 1405 1397 196.50 0.00 0.00 0.00
9 B2u 144 143 0.34 0.00 0.00 0.00
10 B3g 1395 1387 0.00 8.54 0.75 0.86
11 B3g 409 407 0.00 9.97 0.75 0.86
12 B3u 344 342 5.50 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 4088.2 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 4065.7 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 BLYP/3-21G
ABC
0.19299 0.11028 0.07018

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/3-21G

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 0.938
N2 0.000 0.000 -0.938
O3 0.000 1.168 1.416
O4 0.000 -1.168 1.416
O5 0.000 1.168 -1.416
O6 0.000 -1.168 -1.416

Atom - Atom Distances (Å)
  N1 N2 O3 O4 O5 O6
N11.87631.26221.26222.62782.6278
N21.87632.62782.62781.26221.2622
O31.26222.62782.33692.83123.6711
O41.26222.62782.33693.67112.8312
O52.62781.26222.83123.67112.3369
O62.62781.26223.67112.83122.3369

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 112.226 N1 N2 O6 112.226
N2 N1 O3 112.226 N2 N1 O4 112.226
O3 N1 O4 135.547 O5 N2 O6 135.547
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N 0.417      
2 N 0.417      
3 O -0.208      
4 O -0.208      
5 O -0.208      
6 O -0.208      


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 -28.868 0.000 0.000
y 0.000 -35.340 0.000
z 0.000 0.000 -32.581
Traceless
 xyz
x 5.093 0.000 0.000
y 0.000 -4.616 0.000
z 0.000 0.000 -0.478
Polar
3z2-r2-0.955
x2-y26.472
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.154 0.000 0.000
y 0.000 6.043 0.000
z 0.000 0.000 6.276


<r2> (average value of r2) Å2
<r2> 140.289
(<r2>)1/2 11.844