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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: QCISD(T)/6-311+G(3df,2p)

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)/6-311+G(3df,2p)
 hartrees
Energy at 0K-148.545347
Energy at 298.15K-148.547743
HF Energy-147.955889
Nuclear repulsion energy59.888970
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)/6-311+G(3df,2p)
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 3608 3441        
2 A 1249 1191        
3 A 936 893        
4 A 744 710        
5 A 527 503        
6 B 3608 3441        
7 B 2181 2080        
8 B 929 886        
9 B 530 506        

Unscaled Zero Point Vibrational Energy (zpe) 7156.3 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 6825.0 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)/6-311+G(3df,2p)
ABC
12.08071 0.34406 0.34398

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-311+G(3df,2p)

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.022
N2 0.000 1.225 -0.083
N3 0.000 -1.225 -0.083
H4 0.628 1.750 0.513
H5 -0.628 -1.750 0.513

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.22951.22951.92331.9233
N21.22952.45001.01263.0987
N31.22952.45003.09871.0126
H41.92331.01263.09873.7195
H51.92333.09871.01263.7195

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 117.817 C1 N3 H5 117.817
N2 C1 N3 170.195
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability