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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-147.366800
Energy at 298.15K-147.369116
HF Energy-147.051212
Nuclear repulsion energy59.407889
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 MP2/3-21G*
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 3578 3403 17.15      
2 A 1248 1187 0.67      
3 A 864 822 26.00      
4 A 703 669 140.25      
5 A 518 493 1.97      
6 B 3580 3406 146.65      
7 B 2248 2138 327.67      
8 B 844 802 678.63      
9 B 523 497 72.13      

Unscaled Zero Point Vibrational Energy (zpe) 7052.0 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 6708.6 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 MP2/3-21G*
ABC
14.78365 0.33594 0.33584

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.040
N2 0.000 1.230 -0.080
N3 0.000 -1.230 -0.080
H4 0.579 1.886 0.436
H5 -0.579 -1.886 0.436

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.23551.23552.01262.0126
N21.23552.45931.01643.2110
N31.23552.45933.21101.0164
H42.01261.01643.21103.9463
H52.01263.21101.01643.9463

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 126.420 C1 N3 H5 126.420
N2 C1 N3 168.883
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability