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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: QCISD/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-148.517260
Energy at 298.15K-148.519700
HF Energy-147.957078
Nuclear repulsion energy60.128034
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/cc-pVTZ
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 3468 24.33      
2 A 1271 1214 0.00      
3 A 968 925 7.02      
4 A 776 741 87.79      
5 A 539 515 0.00      
6 B 3629 3467 117.77      
7 B 2214 2115 614.07      
8 B 959 916 448.89      
9 B 539 515 79.36      

Unscaled Zero Point Vibrational Energy (zpe) 7261.8 cm-1
Scaled (by 0.9555) Zero Point Vibrational Energy (zpe) 6938.7 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/cc-pVTZ
ABC
11.89460 0.34700 0.34700

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.013
N2 0.000 1.221 -0.080
N3 0.000 -1.221 -0.080
H4 0.635 1.723 0.523
H5 -0.635 -1.723 0.523

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.22501.22501.90601.9060
N21.22502.44291.00943.0721
N31.22502.44293.07211.0094
H41.90601.00943.07213.6725
H51.90603.07211.00943.6725

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 116.760 C1 N3 H5 116.760
N2 C1 N3 171.312
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability