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: PM3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
Energy calculated at PM3
 hartrees
Energy at 0K 
Energy at 298.15K0.075560
HF Energy0.075560
Nuclear repulsion energy42.649447
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 PM3
Rotational Constants (cm-1) from geometry optimized at PM3
ABC
13.21816 0.33362 0.33341

See section I.F.4 to change rotational constant units
Geometric Data calculated at PM3

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.056
N2 0.000 1.242 -0.089
N3 0.000 -1.242 -0.089
H4 0.597 1.810 0.454
H5 -0.597 -1.810 0.454

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.25061.25061.94641.9464
N21.25062.48430.98603.1565
N31.25062.48433.15650.9860
H41.94640.98603.15653.8108
H51.94643.15650.98603.8108

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 120.524 C1 N3 H5 120.524
N2 C1 N3 166.690
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability