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 CHNCH2 (2H-Azirine)

using model chemistry: MP2/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/CEP-121G*
 hartrees
Energy at 0K-22.739435
Energy at 298.15K-22.742461
HF Energy-22.311318
Nuclear repulsion energy33.477933
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 MP2/CEP-121G*
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' 3253 3100 1.86      
2 A' 3148 2999 21.61      
3 A' 1620 1543 5.74      
4 A' 1521 1449 0.12      
5 A' 1286 1225 8.78      
6 A' 1048 998 0.06      
7 A' 1009 961 55.50      
8 A' 675 643 10.44      
9 A" 3257 3104 22.55      
10 A" 1123 1070 0.93      
11 A" 986 940 0.50      
12 A" 783 746 22.60      

Unscaled Zero Point Vibrational Energy (zpe) 9853.9 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 9388.8 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 MP2/CEP-121G*
ABC
1.14747 0.72963 0.49097

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.876 -0.180 0.000
C2 0.000 0.760 0.000
C3 0.669 -0.536 0.000
H4 0.027 1.845 0.000
H5 1.044 -0.965 0.926
H6 1.044 -0.965 -0.926

Atom - Atom Distances (Å)
  N1 C2 C3 H4 H5 H6
N11.28421.58542.21692.27182.2718
C21.28421.45831.08562.21872.2187
C31.58541.45832.46601.08761.0876
H42.21691.08562.46603.12843.1284
H52.27182.21871.08763.12841.8529
H62.27182.21871.08763.12841.8529

picture of 2H-Azirine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 C3 70.304 N1 C2 H4 138.453
N1 C3 C2 49.696 N1 C3 H5 115.136
N1 C3 H6 115.136 C2 N1 C3 60.000
C2 C3 N1 49.696 C2 C3 H5 120.562
C2 C3 H6 120.562 C3 C2 H4 151.243
H5 C3 H6 116.827
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability