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: TPSSh/cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at TPSSh/cc-pVQZ
 hartrees
Energy at 0K-186.899789
Energy at 298.15K 
HF Energy-186.899789
Nuclear repulsion energy89.625659
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 TPSSh/cc-pVQZ
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 3360 3360 0.00 797.58 0.31 0.47
2 Ag 2109 2109 0.00 27.61 0.39 0.56
3 Ag 1176 1176 0.00 26.10 0.61 0.76
4 Ag 930 930 0.00 42.14 0.18 0.30
5 Ag 321 321 0.00 2.45 0.56 0.72
6 Au 961 961 116.17 0.00 0.00 0.00
7 Au 251 251 0.01 0.00 0.00 0.00
8 Bg 688 688 0.00 4.99 0.75 0.86
9 Bu 3361 3361 4.34 0.00 0.00 0.00
10 Bu 1739 1739 153.26 0.00 0.00 0.00
11 Bu 1137 1137 398.10 0.00 0.00 0.00
12 Bu 284 284 6.35 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 8158.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8158.3 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 TPSSh/cc-pVQZ
ABC
8.90466 0.14306 0.14080

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/cc-pVQZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.262 -0.595 0.000
C2 -0.262 0.595 0.000
N3 0.262 -1.838 0.000
N4 -0.262 1.838 0.000
H5 1.208 -2.235 0.000
H6 -1.208 2.235 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6
C11.30011.24362.48911.89283.1883
C21.30012.48911.24363.18831.8928
N31.24362.48913.71401.02524.3300
N42.48911.24363.71404.33001.0252
H51.89283.18831.02524.33005.0800
H63.18831.89284.33001.02525.0800

picture of Ethenediimine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 156.229 C1 N3 H5 112.726
C2 C1 N3 156.229 C2 N4 H6 112.726
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.062      
2 C 0.062      
3 N -0.303      
4 N -0.303      
5 H 0.240      
6 H 0.240      


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


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.720 -2.164 0.000
y -2.164 11.131 0.000
z 0.000 0.000 3.389


<r2> (average value of r2) Å2
<r2> 80.082
(<r2>)1/2 8.949