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 N2H2 ((E)-diazene)

using model chemistry: B3PW91/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at B3PW91/STO-3G
 hartrees
Energy at 0K-109.142835
Energy at 298.15K-109.145517
HF Energy-109.142835
Nuclear repulsion energy30.556050
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/STO-3G
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 3321 2939 0.00      
2 Ag 1700 1505 0.00      
3 Ag 1575 1394 0.00      
4 Au 1323 1171 56.21      
5 Bu 3338 2955 63.13      
6 Bu 1376 1218 56.33      

Unscaled Zero Point Vibrational Energy (zpe) 6317.1 cm-1
Scaled (by 0.885) Zero Point Vibrational Energy (zpe) 5590.6 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/STO-3G
ABC
8.46853 1.19596 1.04797

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/STO-3G

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.660 0.000
N2 0.000 -0.660 0.000
H3 1.069 0.890 0.000
H4 -1.069 -0.890 0.000

Atom - Atom Distances (Å)
  N1 N2 H3 H4
N11.31941.09311.8822
N21.31941.88221.0931
H31.09311.88222.7811
H41.88221.09312.7811

picture of (E)-diazene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 N2 H4 102.144 N2 N1 H3 102.144
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.162      
2 N -0.162      
3 H 0.162      
4 H 0.162      


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 -9.417 2.571 0.000
y 2.571 -12.583 0.000
z 0.000 0.000 -10.824
Traceless
 xyz
x 2.286 2.571 0.000
y 2.571 -2.463 0.000
z 0.000 0.000 0.176
Polar
3z2-r20.353
x2-y23.166
xy2.571
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.430 0.714 0.000
y 0.714 1.601 0.000
z 0.000 0.000 0.416


<r2> (average value of r2) Å2
<r2> 16.794
(<r2>)1/2 4.098