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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: CID/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CID/3-21G*
 hartrees
Energy at 0K-147.337701
Energy at 298.15K-147.340071
HF Energy-147.053926
Nuclear repulsion energy59.974621
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 CID/3-21G*
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 3625 3373 17.64      
2 A 1313 1222 0.10      
3 A 874 813 17.19      
4 A 800 744 149.02      
5 A 519 482 1.32      
6 B 3625 3373 136.16      
7 B 2306 2146 489.92      
8 B 870 809 731.74      
9 B 525 488 87.23      

Unscaled Zero Point Vibrational Energy (zpe) 7227.7 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 6725.3 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 CID/3-21G*
ABC
14.53633 0.34286 0.34263

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.020
N2 0.000 1.219 -0.074
N3 0.000 -1.219 -0.074
H4 0.588 1.848 0.459
H5 -0.588 -1.848 0.459

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.22261.22261.98871.9887
N21.22262.43801.01283.1684
N31.22262.43803.16841.0128
H41.98871.01283.16843.8792
H51.98873.16841.01283.8792

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 125.388 C1 N3 H5 125.388
N2 C1 N3 171.174
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability