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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: MP2/CEP-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 MP2/CEP-31G
 hartrees
Energy at 0K-26.173725
Energy at 298.15K-26.175953
HF Energy-25.882089
Nuclear repulsion energy30.846744
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/CEP-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 3626 3504 9.64      
2 A 1182 1142 0.91      
3 A 805 778 12.38      
4 A 691 668 172.49      
5 A 497 481 0.82      
6 B 3630 3508 149.24      
7 B 2126 2054 474.17      
8 B 762 736 756.21      
9 B 506 489 98.36      

Unscaled Zero Point Vibrational Energy (zpe) 6912.1 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 6679.2 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/CEP-31G
ABC
14.00379 0.31890 0.31866

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.063
N2 0.000 1.263 -0.088
N3 0.000 -1.263 -0.088
H4 0.581 1.930 0.430
H5 -0.581 -1.930 0.430

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.27201.27202.04862.0486
N21.27202.52601.02533.2864
N31.27202.52603.28641.0253
H42.04861.02533.28644.0307
H52.04863.28641.02534.0307

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 125.839 C1 N3 H5 125.839
N2 C1 N3 166.346
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability