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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-148.342395
Energy at 298.15K-148.344799
HF Energy-147.893089
Nuclear repulsion energy59.881341
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 MP3/6-31G*
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 3630 3407 20.75      
2 A 1307 1227 0.03      
3 A 971 911 7.23      
4 A 818 767 110.99      
5 A 516 485 0.03      
6 B 3629 3406 94.92      
7 B 2267 2128 590.84      
8 B 966 907 506.38      
9 B 513 481 76.86      

Unscaled Zero Point Vibrational Energy (zpe) 7308.4 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 6859.6 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 MP3/6-31G*
ABC
11.92004 0.34418 0.34414

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.018
N2 0.000 1.225 -0.082
N3 0.000 -1.225 -0.082
H4 0.636 1.742 0.517
H5 -0.636 -1.742 0.517

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.22941.22941.92051.9205
N21.22942.45081.01483.0932
N31.22942.45083.09321.0148
H41.92051.01483.09323.7089
H51.92053.09321.01483.7089

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 117.366 C1 N3 H5 117.366
N2 C1 N3 170.723
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability