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: TPSSh/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at TPSSh/3-21G
 hartrees
Energy at 0K-131.933458
Energy at 298.15K-131.936449
HF Energy-131.933458
Nuclear repulsion energy62.240869
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 TPSSh/3-21G
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' 3247 3146 2.15      
2 A' 3149 3051 9.31      
3 A' 1605 1555 4.48      
4 A' 1514 1467 0.55      
5 A' 1191 1154 17.85      
6 A' 1013 982 10.02      
7 A' 955 925 60.06      
8 A' 645 625 4.31      
9 A" 3255 3153 17.38      
10 A" 1102 1068 1.46      
11 A" 959 929 0.05      
12 A" 806 781 29.84      

Unscaled Zero Point Vibrational Energy (zpe) 9720.4 cm-1
Scaled (by 0.9688) Zero Point Vibrational Energy (zpe) 9417.1 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 TPSSh/3-21G
ABC
1.15071 0.69804 0.47738

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.895 -0.155 0.000
C2 0.000 0.761 0.000
C3 0.684 -0.559 0.000
H4 0.072 1.836 0.000
H5 1.046 -0.981 0.930
H6 1.046 -0.981 -0.930

Atom - Atom Distances (Å)
  N1 C2 C3 H4 H5 H6
N11.28101.63042.21342.30562.3056
C21.28101.48681.07732.23432.2343
C31.63041.48682.47201.08331.0833
H42.21341.07732.47203.12203.1220
H52.30562.23431.08333.12201.8601
H62.30562.23431.08333.12201.8601

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 71.741 N1 C2 H4 139.471
N1 C3 C2 48.259 N1 C3 H5 114.839
N1 C3 H6 114.839 C2 N1 C3 60.000
C2 C3 N1 48.259 C2 C3 H5 119.945
C2 C3 H6 119.945 C3 C2 H4 148.788
H5 C3 H6 118.294
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.355      
2 C 0.032      
3 C -0.378      
4 H 0.234      
5 H 0.233      
6 H 0.233      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.831 1.222 0.000 2.201
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.463 -0.643 0.000
y -0.643 4.063 0.000
z 0.000 0.000 2.270


<r2> (average value of r2) Å2
<r2> 34.317
(<r2>)1/2 5.858