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: BLYP/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at BLYP/6-31+G**
 hartrees
Energy at 0K-186.784407
Energy at 298.15K 
HF Energy-186.784407
Nuclear repulsion energy88.432811
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/6-31+G**
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 3273 3256 0.00 734.13 0.35 0.52
2 Ag 1985 1975 0.00 39.70 0.35 0.51
3 Ag 1145 1139 0.00 36.55 0.70 0.82
4 Ag 905 900 0.00 47.99 0.16 0.28
5 Ag 362 360 0.00 6.04 0.25 0.40
6 Au 919 914 127.37 0.00 0.00 0.00
7 Au 248 247 0.14 0.00 0.00 0.00
8 Bg 705 701 0.00 6.30 0.75 0.86
9 Bu 3274 3257 0.90 0.00 0.00 0.00
10 Bu 1690 1681 152.71 0.00 0.00 0.00
11 Bu 1092 1086 384.32 0.00 0.00 0.00
12 Bu 272 270 9.09 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 7934.5 cm-1
Scaled (by 0.9947) Zero Point Vibrational Energy (zpe) 7892.5 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 BLYP/6-31+G**
ABC
7.69234 0.14070 0.13817

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.323 -0.581 0.000
C2 -0.323 0.581 0.000
N3 0.323 -1.843 0.000
N4 -0.323 1.843 0.000
H5 1.280 -2.239 0.000
H6 -1.280 2.239 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6
C11.32871.26192.50781.91503.2436
C21.32872.50781.26193.24361.9150
N31.26192.50783.74131.03654.3852
N42.50781.26193.74134.38521.0365
H51.91503.24361.03654.38525.1586
H63.24361.91504.38521.03655.1586

picture of Ethenediimine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 150.955 C1 N3 H5 112.494
C2 C1 N3 150.955 C2 N4 H6 112.494
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.119      
2 C 0.119      
3 N -0.398      
4 N -0.398      
5 H 0.279      
6 H 0.279      


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 -20.352 -7.467 0.000
y -7.467 -24.271 0.000
z 0.000 0.000 -23.470
Traceless
 xyz
x 3.518 -7.467 0.000
y -7.467 -2.360 0.000
z 0.000 0.000 -1.159
Polar
3z2-r2-2.317
x2-y23.919
xy-7.467
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.946 -2.425 0.000
y -2.425 11.572 0.000
z 0.000 0.000 3.219


<r2> (average value of r2) Å2
<r2> 81.770
(<r2>)1/2 9.043