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: CCSD(T)/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 CCSD(T)/6-31+G**
 hartrees
Energy at 0K-186.326248
Energy at 298.15K 
HF Energy-185.680970
Nuclear repulsion energy88.464088
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 CCSD(T)/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 3466 3326        
2 Ag 1967 1888        
3 Ag 1184 1136        
4 Ag 914 877        
5 Ag 378 363        
6 Au 931 893        
7 Au 236 227        
8 Bg 714 685        
9 Bu 3466 3326        
10 Bu 1696 1627        
11 Bu 1130 1084        
12 Bu 287 275        

Unscaled Zero Point Vibrational Energy (zpe) 8183.8 cm-1
Scaled (by 0.9596) Zero Point Vibrational Energy (zpe) 7853.2 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 CCSD(T)/6-31+G**
ABC
6.99326 0.14172 0.13890

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.182 -0.646 0.000
C2 -0.182 0.646 0.000
N3 -0.182 -1.855 0.000
N4 0.182 1.855 0.000
H5 0.626 -2.485 0.000
H6 -0.626 2.485 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6
C11.34201.26302.50091.89263.2340
C21.34202.50091.26303.23401.8926
N31.26302.50093.72811.02524.3633
N42.50091.26303.72814.36331.0252
H51.89263.23401.02524.36335.1264
H63.23401.89264.36331.02525.1264

picture of Ethenediimine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 147.488 C1 N3 H5 111.180
C2 C1 N3 147.488 C2 N4 H6 111.180
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability