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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: MP4=FULL/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 MP4=FULL/3-21G
 hartrees
Energy at 0K-147.397544
Energy at 298.15K-147.399846
HF Energy-147.049229
Nuclear repulsion energy59.083208
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 MP4=FULL/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 3515 3440        
2 A 1201 1175        
3 A 882 863        
4 A 701 687        
5 A 502 491        
6 B 3519 3444        
7 B 2183 2137        
8 B 861 843        
9 B 506 495        

Unscaled Zero Point Vibrational Energy (zpe) 6934.7 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 6787.7 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 MP4=FULL/3-21G
ABC
14.17202 0.33259 0.33255

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/3-21G

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.045
N2 0.000 1.237 -0.083
N3 0.000 -1.237 -0.083
H4 0.589 1.884 0.442
H5 -0.589 -1.884 0.442

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.24341.24342.01332.0133
N21.24342.47361.02033.2189
N31.24342.47363.21891.0203
H42.01331.02033.21893.9476
H52.01333.21891.02033.9476

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 125.305 C1 N3 H5 125.305
N2 C1 N3 168.179
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability