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: MP3/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at MP3/Def2TZVPP
 hartrees
Energy at 0K-186.457832
Energy at 298.15K 
HF Energy-185.752312
Nuclear repulsion energy89.717968
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 MP3/Def2TZVPP
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 3497 3497 0.00      
2 Ag 2181 2181 0.00      
3 Ag 1202 1202 0.00      
4 Ag 945 945 0.00      
5 Ag 304 304 0.00      
6 Au 978 978 123.35      
7 Au 249 249 0.07      
8 Bg 666 666 0.00      
9 Bu 3497 3497 24.33      
10 Bu 1771 1771 152.09      
11 Bu 1175 1175 372.46      
12 Bu 288 288 6.03      

Unscaled Zero Point Vibrational Energy (zpe) 8375.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8375.7 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 MP3/Def2TZVPP
ABC
9.17643 0.14275 0.14056

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/Def2TZVPP

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.241 -0.604 0.000
C2 -0.241 0.604 0.000
N3 0.241 -1.846 0.000
N4 -0.241 1.846 0.000
H5 1.188 -2.219 0.000
H6 -1.188 2.219 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6
C11.29981.24212.49621.87263.1638
C21.29982.49621.24213.16381.8726
N31.24212.49623.72261.01784.3087
N42.49621.24213.72264.30871.0178
H51.87263.16381.01784.30875.0343
H63.16381.87264.30871.01785.0343

picture of Ethenediimine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 158.218 C1 N3 H5 111.534
C2 C1 N3 158.218 C2 N4 H6 111.534
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability