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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: QCISD/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 QCISD/6-31G
 hartrees
Energy at 0K-148.138619
Energy at 298.15K-148.140898
HF Energy-147.810089
Nuclear repulsion energy59.039099
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 QCISD/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 3606 3475 9.02      
2 A 1239 1194 0.08      
3 A 876 845 15.92      
4 A 768 740 154.72      
5 A 492 474 0.86      
6 B 3609 3478 106.09      
7 B 2184 2104 460.51      
8 B 866 835 714.89      
9 B 456 439 55.55      

Unscaled Zero Point Vibrational Energy (zpe) 7047.9 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 6791.4 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 QCISD/6-31G
ABC
14.26001 0.33182 0.33179

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.051
N2 0.000 1.238 -0.084
N3 0.000 -1.238 -0.084
H4 0.584 1.887 0.435
H5 -0.584 -1.887 0.435

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.24561.24562.01242.0124
N21.24562.47641.01593.2215
N31.24562.47643.22151.0159
H42.01241.01593.22153.9510
H52.01243.22151.01593.9510

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 125.404 C1 N3 H5 125.404
N2 C1 N3 167.520
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability