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 HNCNH (diiminomethane)

using model chemistry: CISD/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CISD/6-311+G(3df,2p)
 hartrees
Energy at 0K-148.454344
Energy at 298.15K-148.456819
HF Energy-147.958394
Nuclear repulsion energy60.628383
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 CISD/6-311+G(3df,2p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3738 3446 32.29      
2 A 1328 1224 0.01      
3 A 961 886 11.88      
4 A 778 717 95.24      
5 A 564 520 0.04      
6 B 3734 3442 182.70      
7 B 2275 2097 846.28      
8 B 954 879 474.24      
9 B 567 522 97.36      

Unscaled Zero Point Vibrational Energy (zpe) 7449.2 cm-1
Scaled (by 0.9218) Zero Point Vibrational Energy (zpe) 6866.7 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 CISD/6-311+G(3df,2p)
ABC
12.42514 0.35250 0.35246

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-311+G(3df,2p)

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.008
N2 0.000 1.210 -0.077
N3 0.000 -1.210 -0.077
H4 0.623 1.728 0.515
H5 -0.623 -1.728 0.515

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.21331.21331.90591.9059
N21.21332.42061.00343.0617
N31.21332.42063.06171.0034
H41.90591.00343.06173.6744
H51.90593.06171.00343.6744

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 118.287 C1 N3 H5 118.287
N2 C1 N3 172.012
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability