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 CHNHCH (1H-Azirine)

using model chemistry: QCISD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-132.313617
Energy at 298.15K-132.316400
HF Energy-131.792915
Nuclear repulsion energy63.173215
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/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3415 3235 2.08      
2 A' 3391 3212 18.66      
3 A' 1781 1687 5.08      
4 A' 1407 1333 15.99      
5 A' 1100 1042 3.13      
6 A' 918 870 22.00      
7 A' 585 554 63.50      
8 A" 3353 3177 16.18      
9 A" 1184 1121 38.45      
10 A" 985 933 15.36      
11 A" 732 693 3.61      
12 A" 606 574 1.95      

Unscaled Zero Point Vibrational Energy (zpe) 9727.4 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 9215.8 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/6-31G(2df,p)
ABC
1.05531 0.80892 0.48020

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.038 0.899 0.000
C2 -0.038 -0.478 0.639
C3 -0.038 -0.478 -0.639
H4 0.934 1.223 0.000
H5 -0.109 -0.891 1.625
H6 -0.109 -0.891 -1.625

Atom - Atom Distances (Å)
  N1 C2 C3 H4 H5 H6
N11.51771.51771.02442.41882.4188
C21.51771.27802.06021.07142.3023
C31.51771.27802.06022.30231.0714
H41.02442.06022.06022.86312.8631
H52.41881.07142.30232.86313.2495
H62.41882.30231.07142.86313.2495

picture of 1H-Azirine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 C3 65.102 N1 C2 H5 137.530
N1 C3 C2 65.102 N1 C3 H6 137.530
C2 N1 C3 49.796 C2 N1 H4 106.664
C2 C3 H6 156.932 C3 N1 H4 106.664
C3 C2 H5 156.932
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability