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: mPW1PW91/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at mPW1PW91/aug-cc-pVTZ
 hartrees
Energy at 0K-186.827093
Energy at 298.15K 
HF Energy-186.827093
Nuclear repulsion energy90.000222
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 mPW1PW91/aug-cc-pVTZ
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 3434 3290 0.00 703.46 0.30 0.46
2 Ag 2204 2112 0.00 27.68 0.40 0.58
3 Ag 1173 1124 0.00 27.83 0.50 0.67
4 Ag 948 908 0.00 51.19 0.16 0.27
5 Ag 309 296 0.00 2.85 0.56 0.72
6 Au 968 928 120.00 0.00 0.00 0.00
7 Au 255 244 0.02 0.00 0.00 0.00
8 Bg 676 648 0.00 3.42 0.75 0.86
9 Bu 3434 3290 14.97 0.00 0.00 0.00
10 Bu 1780 1705 195.75 0.00 0.00 0.00
11 Bu 1144 1096 364.84 0.00 0.00 0.00
12 Bu 285 273 6.45 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 8305.1 cm-1
Scaled (by 0.9581) Zero Point Vibrational Energy (zpe) 7957.1 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 mPW1PW91/aug-cc-pVTZ
ABC
9.71112 0.14332 0.14123

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVTZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.218 -0.607 0.000
C2 -0.218 0.607 0.000
N3 0.218 -1.844 0.000
N4 -0.218 1.844 0.000
H5 1.158 -2.242 0.000
H6 -1.158 2.242 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6
C11.29001.23682.48931.88613.1642
C21.29002.48931.23683.16421.8861
N31.23682.48933.71331.02104.3115
N42.48931.23683.71334.31151.0210
H51.88613.16421.02104.31155.0473
H63.16421.88614.31151.02105.0473

picture of Ethenediimine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 160.228 C1 N3 H5 112.962
C2 C1 N3 160.228 C2 N4 H6 112.962
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.259      
2 C 0.259      
3 N -0.395      
4 N -0.395      
5 H 0.136      
6 H 0.136      


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 -20.475 -7.277 0.000
y -7.277 -23.661 0.000
z 0.000 0.000 -22.962
Traceless
 xyz
x 2.836 -7.277 0.000
y -7.277 -1.943 0.000
z 0.000 0.000 -0.893
Polar
3z2-r2-1.786
x2-y23.186
xy-7.277
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.795 -1.846 0.000
y -1.846 11.473 0.000
z 0.000 0.000 3.726


<r2> (average value of r2) Å2
<r2> 79.959
(<r2>)1/2 8.942