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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: QCISD(T)/daug-cc-pVDZ

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)/daug-cc-pVDZ
 hartrees
Energy at 0K-148.433239
Energy at 298.15K-148.435638
HF Energy-147.922828
Nuclear repulsion energy59.176093
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)/daug-cc-pVDZ
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 3552 3552        
2 A 1221 1221        
3 A 972 972        
4 A 758 758        
5 A 512 512        
6 B 3552 3552        
7 B 2131 2131        
8 B 965 965        
9 B 516 516        

Unscaled Zero Point Vibrational Energy (zpe) 7088.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7088.8 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)/daug-cc-pVDZ
ABC
11.37761 0.33634 0.33618

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.025
N2 0.000 1.241 -0.086
N3 0.000 -1.241 -0.086
H4 0.643 1.744 0.528
H5 -0.643 -1.744 0.528

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.24631.24631.92601.9260
N21.24632.48261.02213.1154
N31.24632.48263.11541.0221
H41.92601.02213.11543.7184
H51.92603.11541.02213.7184

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 115.867 C1 N3 H5 115.867
N2 C1 N3 169.717
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability