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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: MP4/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 MP4/cc-pVDZ
 hartrees
Energy at 0K-148.399127
Energy at 298.15K-148.401490
HF Energy-147.908349
Nuclear repulsion energy59.087479
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 MP4/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 3565 3447        
2 A 1211 1171        
3 A 965 933        
4 A 761 736        
5 A 494 477        
6 B 3567 3449        
7 B 2163 2091        
8 B 953 922        
9 B 500 484        

Unscaled Zero Point Vibrational Energy (zpe) 7089.2 cm-1
Scaled (by 0.9669) Zero Point Vibrational Energy (zpe) 6854.5 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 MP4/cc-pVDZ
ABC
11.10956 0.33573 0.33560

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/cc-pVDZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.029
N2 0.000 1.243 -0.088
N3 0.000 -1.243 -0.088
H4 0.652 1.736 0.531
H5 -0.652 -1.736 0.531

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.24871.24871.92071.9207
N21.24872.48641.02473.1115
N31.24872.48643.11151.0247
H41.92071.02473.11153.7080
H51.92073.11151.02473.7080

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 114.963 C1 N3 H5 114.963
N2 C1 N3 169.256
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability