return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: QCISD/6-311G**

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/6-311G**
 hartrees
Energy at 0K-148.425787
Energy at 298.15K-148.428202
HF Energy-147.936584
Nuclear repulsion energy59.902141
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/6-311G**
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 3622 3455 21.65      
2 A 1261 1203 0.00      
3 A 965 921 3.03      
4 A 794 758 92.15      
5 A 520 496 0.02      
6 B 3622 3456 86.49      
7 B 2209 2108 550.69      
8 B 957 913 432.55      
9 B 521 497 78.32      

Unscaled Zero Point Vibrational Energy (zpe) 7234.5 cm-1
Scaled (by 0.9541) Zero Point Vibrational Energy (zpe) 6902.4 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/6-311G**
ABC
11.50833 0.34482 0.34479

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.014
N2 0.000 1.227 -0.082
N3 0.000 -1.227 -0.082
H4 0.645 1.712 0.531
H5 -0.645 -1.712 0.531

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.23041.23041.90171.9017
N21.23042.45341.01363.0708
N31.23042.45343.07081.0136
H41.90171.01363.07083.6600
H51.90173.07081.01363.6600

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 115.535 C1 N3 H5 115.535
N2 C1 N3 171.132
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability