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/SDD

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/SDD
 hartrees
Energy at 0K-148.072631
Energy at 298.15K-148.075328
HF Energy-147.719518
Nuclear repulsion energy60.304279
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/SDD
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 3175 3064 3.90      
2 A1 1511 1459 0.51      
3 A1 1158 1118 2.55      
4 A1 825 796 13.60      
5 A2 960 926 0.00      
6 B1 3332 3216 13.86      
7 B1 1117 1078 1.82      
8 B2 1036 1000 30.28      
9 B2 644 622 8.57      

Unscaled Zero Point Vibrational Energy (zpe) 6878.4 cm-1
Scaled (by 0.9653) Zero Point Vibrational Energy (zpe) 6639.7 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/SDD
ABC
1.17449 0.72465 0.49596

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/SDD

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.856
N2 0.000 0.669 -0.565
N3 0.000 -0.669 -0.565
H4 0.949 0.000 1.390
H5 -0.949 0.000 1.390

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.57081.57081.08841.0884
N21.57081.33832.27362.2736
N31.57081.33832.27362.2736
H41.08842.27362.27361.8970
H51.08842.27362.27361.8970

picture of diazirine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 N3 64.786 C1 N3 N2 64.786
N2 C1 N3 50.428 N2 C1 H4 116.346
N2 C1 H5 116.346 N3 C1 H4 116.346
N3 C1 H5 116.346 H4 C1 H5 121.250
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability