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: MP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-186.244290
Energy at 298.15K 
HF Energy-185.667427
Nuclear repulsion energy88.706256
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 MP2/6-31G*
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 3421 3226 0.00 585.74 0.32 0.48
2 Ag 2058 1940 0.00 4.72 0.75 0.86
3 Ag 1191 1123 0.00 36.88 0.73 0.84
4 Ag 930 877 0.00 22.89 0.26 0.41
5 Ag 360 340 0.00 3.72 0.12 0.21
6 Au 960 906 144.79 0.00 0.00 0.00
7 Au 249 234 0.00 0.00 0.00 0.00
8 Bg 723 682 0.00 8.71 0.75 0.86
9 Bu 3422 3227 9.02 0.00 0.32 0.48
10 Bu 1724 1625 78.83 0.00 0.00 0.00
11 Bu 1128 1064 459.92 0.00 0.00 0.00
12 Bu 287 270 6.89 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 8225.7 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 7756.8 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 MP2/6-31G*
ABC
7.63387 0.14165 0.13907

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.323 -0.577 0.000
C2 -0.323 0.577 0.000
N3 0.323 -1.838 0.000
N4 -0.323 1.838 0.000
H5 1.280 -2.217 0.000
H6 -1.280 2.217 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6
C11.32261.26082.49971.89853.2210
C21.32262.49971.26083.22101.8985
N31.26082.49973.73191.02934.3599
N42.49971.26083.73194.35991.0293
H51.89853.22101.02934.35995.1195
H63.22101.89854.35991.02935.1195

picture of Ethenediimine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 150.741 C1 N3 H5 111.597
C2 C1 N3 150.741 C2 N4 H6 111.597
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability