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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: QCISD(T)/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(T)/6-31G*
 hartrees
Energy at 0K-148.370382
Energy at 298.15K-148.372743
HF Energy-147.890908
Nuclear repulsion energy59.423870
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(T)/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 3558 3413        
2 A 1250 1199        
3 A 964 924        
4 A 783 751        
5 A 501 480        
6 B 3560 3415        
7 B 2200 2110        
8 B 957 918        
9 B 497 477        

Unscaled Zero Point Vibrational Energy (zpe) 7134.3 cm-1
Scaled (by 0.9593) Zero Point Vibrational Energy (zpe) 6844.0 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(T)/6-31G*
ABC
11.78655 0.33886 0.33885

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.029
N2 0.000 1.235 -0.085
N3 0.000 -1.235 -0.085
H4 0.638 1.760 0.511
H5 -0.638 -1.760 0.511

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.23981.23981.93331.9333
N21.23982.46901.01933.1195
N31.23982.46903.11951.0193
H41.93331.01933.11953.7446
H51.93333.11951.01933.7446

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 117.360 C1 N3 H5 117.360
N2 C1 N3 169.394
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability