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Experimental data for CH2N2 (diazirine)

22 02 02 11 45
Other names
3H-Diazirine;
INChI INChIKey SMILES IUPAC name
InChI=1S/CH2N2/c1-2-3-1/h1H2 GKVDXUXIAHWQIK-UHFFFAOYSA-N N1N=C1 3H-Diazirine
State Conformation
1A1 C2V
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency Intensity Comment Description
Fundamental(cm-1) Harmonic(cm-1) Reference (km mol-1) unc. Reference

Calculated vibrational frequencies for CH2N2 (diazirine).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
1.36617 0.78947 0.55793 1962Pie/Dob:2651-2652

Calculated rotational constants for CH2N2 (diazirine).
Product of moments of inertia moments of inertia
7961.053amu3Å6   3.64534397970527E-116gm3 cm6
Geometric Data
picture of diazirine

Point Group C2v


Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees
Description Value unc. Connectivity Reference Comment
Atom 1 Atom 2 Atom 3 Atom 4
rNN 1.228 0.003 2 3 1962Pie/Dob:2651-2652
rCN 1.482 0.003 1 2 1962Pie/Dob:2651-2652
rCH 1.090 0.020 1 4 1962Pie/Dob:2651-2652
aHCH 117 2 4 1 5 1962Pie/Dob:2651-2652

Cartesians
Atom x (Å) y (Å) z (Å)
C1 0.0000 0.0000 0.8066
N2 0.0000 0.6140 -0.5423
N3 0.0000 -0.6140 -0.5423
H4 0.9294 0.0000 1.3761
H5 -0.9294 0.0000 1.3761

Atom - Atom Distances bond lengths
Distances in Å
  C1 N2 N3 H4 H5
C1   1.48211.48211.09001.0900
N2 1.4821   1.22812.21842.2184
N3 1.48211.2281   2.21842.2184
H4 1.09002.21842.2184   1.8588
H5 1.09002.21842.21841.8588  

Calculated geometries for CH2N2 (diazirine).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
C1 N2 N3 65.524 C1 N3 N2 65.524
N2 C1 N3 48.951 N2 C1 H4 118.395
N2 C1 H5 118.395 N3 C1 H4 118.395
N3 C1 H5 118.395 H4 C1 H5 117.000

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
H-C 2
C-N 2
N=N 1

Connectivity
Atom 1 Atom 2
C1 N2
C1 N3
C1 H4
C1 H5
N2 N3
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A1

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
10.300       webbook
Dipole, Quadrupole and Polarizability
Electric dipole moment dipole
State Config State description Conf description Exp. min. Dipole (Debye) Reference comment Point Group Components
x y z total dipole quadrupole
1 1 1A1 C2v True       1.590 1962Pie/Dob:2651-2652 MW μ0 ±0.06 D (N Quadrupole interference) C2v 1 2
Experimental dipole measurement abbreviations: MW microwave; DT Dielectric with Temperature variation; DR Indirect (usually an upper limit); MB Molecular beam
Calculated electric dipole moments for CH2N2 (diazirine).
Electric quadrupole moment quadrupole
State Config State description Conf description Exp. min. Quadrupole (D Å) Reference comment Point Group Components
xx yy zz dipole quadrupole
1 1 1A1 C2v True       C2v 1 2

Calculated electric quadrupole moments for CH2N2 (diazirine).

References
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squib reference DOI
1962Pie/Dob:2651-2652 L Pierce, V Dobyns "Molecular Structure, Dipole Moment, and Quadrupole Coupling Constants of Diazirine" J. Am. Chem. Soc. 84, 2651-2 (1962). 10.1021/ja00872a043
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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