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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: QCISD(T)/TZVP

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)/TZVP
 hartrees
Energy at 0K-148.458769
Energy at 298.15K-148.461132
HF Energy-147.946401
Nuclear repulsion energy59.841529
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)/TZVP
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 3593 3461        
2 A 1248 1202        
3 A 909 875        
4 A 768 740        
5 A 510 491        
6 B 3594 3462        
7 B 2184 2104        
8 B 898 865        
9 B 508 489        

Unscaled Zero Point Vibrational Energy (zpe) 7105.9 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 6844.4 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(T)/TZVP
ABC
11.78499 0.34389 0.34380

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/TZVP

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.024
N2 0.000 1.226 -0.084
N3 0.000 -1.226 -0.084
H4 0.635 1.738 0.517
H5 -0.635 -1.738 0.517

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.23121.23121.91491.9149
N21.23122.45271.01363.0907
N31.23122.45273.09071.0136
H41.91491.01363.09073.7007
H51.91493.09071.01363.7007

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 116.753 C1 N3 H5 116.753
N2 C1 N3 169.857
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability