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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-147.340076
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 3377 17.64      
2 A 1313 1223 0.10      
3 A 874 814 17.19      
4 A 800 745 149.02      
5 A 519 483 1.32      
6 B 3625 3377 136.16      
7 B 2306 2148 489.92      
8 B 870 810 731.74      
9 B 525 489 87.23      

Unscaled Zero Point Vibrational Energy (zpe) 7227.7 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 6733.3 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