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 HNCCNH (Ethenediimine)

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-186.728729
Energy at 298.15K 
HF Energy-186.728729
Nuclear repulsion energy89.341140
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*
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 3390 3244 0.00      
2 Ag 2171 2077 0.00      
3 Ag 1197 1145 0.00      
4 Ag 949 908 0.00      
5 Ag 332 318 0.00      
6 Au 966 924 141.33      
7 Au 255 244 0.04      
8 Bg 693 663 0.00      
9 Bu 3391 3244 2.19      
10 Bu 1783 1705 156.55      
11 Bu 1153 1104 406.99      
12 Bu 285 273 6.57      

Unscaled Zero Point Vibrational Energy (zpe) 8282.0 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 7923.4 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*
ABC
8.77371 0.14217 0.13990

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.263 -0.597 0.000
C2 -0.263 0.597 0.000
N3 0.263 -1.845 0.000
N4 -0.263 1.845 0.000
H5 1.215 -2.232 0.000
H6 -1.215 2.232 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6
C11.30521.24762.49811.89193.1922
C21.30522.49811.24763.19221.8919
N31.24762.49813.72711.02794.3367
N42.49811.24763.72714.33671.0279
H51.89193.19221.02794.33675.0829
H63.19221.89194.33671.02795.0829

picture of Ethenediimine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 156.241 C1 N3 H5 112.135
C2 C1 N3 156.241 C2 N4 H6 112.135
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.249      
2 C 0.249      
3 N -0.592      
4 N -0.592      
5 H 0.343      
6 H 0.343      


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 -19.515 -7.514 0.000
y -7.514 -23.123 0.000
z 0.000 0.000 -22.405
Traceless
 xyz
x 3.249 -7.514 0.000
y -7.514 -2.163 0.000
z 0.000 0.000 -1.086
Polar
3z2-r2-2.172
x2-y23.608
xy-7.514
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.633 -2.311 0.000
y -2.311 10.045 0.000
z 0.000 0.000 2.008


<r2> (average value of r2) Å2
<r2> 80.189
(<r2>)1/2 8.955