return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for CH2N2 (diazirine)

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 C2V 1A1
Energy calculated at MP2/CEP-121G*
 hartrees
Energy at 0K-26.385220
Energy at 298.15K-26.388067
HF Energy-25.914844
Nuclear repulsion energy33.503448
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 A1 3182 3032 4.90      
2 A1 1560 1487 2.58      
3 A1 1458 1390 11.15      
4 A1 1020 972 5.89      
5 A2 1002 954 0.00      
6 B1 3322 3165 14.80      
7 B1 1153 1098 3.56      
8 B2 1013 965 32.18      
9 B2 810 771 14.66      

Unscaled Zero Point Vibrational Energy (zpe) 7259.5 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 6916.8 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
1.28684 0.78351 0.54283

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.815
N2 0.000 0.636 -0.543
N3 0.000 -0.636 -0.543
H4 0.940 0.000 1.354
H5 -0.940 0.000 1.354

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.49891.49891.08361.0836
N21.49891.27152.21022.2102
N31.49891.27152.21022.2102
H41.08362.21022.21021.8795
H51.08362.21022.21021.8795

picture of diazirine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 N3 64.902 C1 N3 N2 64.902
N2 C1 N3 50.195 N2 C1 H4 116.795
N2 C1 H5 116.795 N3 C1 H4 116.795
N3 C1 H5 116.795 H4 C1 H5 120.291
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability