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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: QCISD/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-148.382163
Energy at 298.15K-148.384550
HF Energy-147.906808
Nuclear repulsion energy59.658868
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/6-31+G**
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 3665 3465 20.38      
2 A 1269 1200 0.02      
3 A 948 896 4.18      
4 A 787 744 107.57      
5 A 522 494 0.00      
6 B 3665 3465 111.01      
7 B 2199 2079 654.04      
8 B 940 888 486.04      
9 B 502 475 71.08      

Unscaled Zero Point Vibrational Energy (zpe) 7248.0 cm-1
Scaled (by 0.9454) Zero Point Vibrational Energy (zpe) 6852.3 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/6-31+G**
ABC
11.91300 0.34138 0.34127

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31+G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.028
N2 0.000 1.230 -0.085
N3 0.000 -1.230 -0.085
H4 0.631 1.751 0.512
H5 -0.631 -1.751 0.512

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.23561.23561.92271.9227
N21.23562.46091.01253.1050
N31.23562.46093.10501.0125
H41.92271.01253.10503.7219
H51.92273.10501.01253.7219

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 117.231 C1 N3 H5 117.231
N2 C1 N3 169.491
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability