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: Experimental > One molecule all properties

Experimental data for CH3NO2 (Methane, nitro-)

22 02 02 11 45
Other names
Methane, nitro-; Nitrocarbol; Nitrometan; Nitromethane;
INChI INChIKey SMILES IUPAC name
InChI=1S/CH3NO2/c1-2(3)4/h1H3 LYGJENNIWJXYER-UHFFFAOYSA-N C[N](=O)=O Nitromethane
State Conformation
1A' CS Os out of place
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Hfg(298.15K) enthalpy of formation -71.50 0.40 kJ mol-1 2014Ver/Eme:163-170
Hfg(0K) enthalpy of formation   0.40 kJ mol-1 2014Ver/Eme:163-170
Entropy (298.15K) entropy 275.20   J K-1 mol-1 TRC
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 12.90   kJ mol-1 TRC
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
1 A' 3045   1993Gor/Cav:4262      
2 A' 2974   1993Gor/Cav:4262      
3 A' 1397   1993Gor/Cav:4262      
4 A' 1434   1993Gor/Cav:4262      
5 A' 1380   1993Gor/Cav:4262      
6 A' 1131   1993Gor/Cav:4262      
7 A' 918   1993Gor/Cav:4262      
8 A' 657   1993Gor/Cav:4262      
9 A' 603   1993Gor/Cav:4262      
10 A" 3080   1993Gor/Cav:4262      
11 A" 1583   1993Gor/Cav:4262      
12 A" 1410   1993Gor/Cav:4262      
13 A" 1096   1993Gor/Cav:4262      
14 A" 475   1993Gor/Cav:4262      
15 A"             internal rotation, almost free rotor

vibrational zero-point energy: 10591.5 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for CH3NO2 (Methane, nitro-).
Gas-phase IR spectra can be found in the NIST Chemistry Webbook here.
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
0.44504 0.35172 0.19599 1975Roh:301

Calculated rotational constants for CH3NO2 (Methane, nitro-).
Product of moments of inertia moments of inertia
156152.8amu3Å6   7.15019213065875E-115gm3 cm6
Geometric Data
picture of Methane, nitro-

Point Group Cs


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
rCH 1.088   1 3 1976Hellwege(II/7) !assumed
rCN 1.489   1 2 1976Hellwege(II/7)
rNO 1.224   2 6 1976Hellwege(II/7)
aHCN 107.2 2 1 3 1976Hellwege(II/7)
aONO 125.3 6 2 7 1976Hellwege(II/7)

These cartesians were determined using some assumed coordinate values. Cartesians
Atom x (Å) y (Å) z (Å)
C1 1.4008 0.0000 0.0000
N2 -0.0878 0.0000 0.0000
H3 1.7215 -1.0392 0.0000
H4 1.7215 0.5196 0.9000
H5 1.7215 0.5196 -0.9000
O6 -0.6498 1.0874 0.0000
O7 -0.6498 -1.0874 0.0000

Atom - Atom Distances bond lengths
Distances in Å
  C1 N2 H3 H4 H5 O6 O7
C1   1.48861.08761.08761.08762.32112.3211
N2 1.4886   2.08652.08652.08651.22401.2240
H3 1.08762.0865   1.80001.80003.18522.3718
H4 1.08762.08651.8000   1.80002.59913.0026
H5 1.08762.08651.80001.8000   2.59913.0026
O6 2.32111.22403.18522.59912.5991   2.1748
O7 2.32111.22402.37183.00263.00262.1748  

Calculated geometries for CH3NO2 (Methane, nitro-).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
C1 N2 O6 117.331 C1 N2 O7 117.331
N2 C1 H3 107.150 N2 C1 H4 107.150
N2 C1 H5 107.150 H3 C1 H4 111.689
H3 C1 H5 111.689 H4 C1 H5 111.691
O6 N2 O7 125.338

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
H-C 3
C-N 1
N=O 2

Connectivity
Atom 1 Atom 2
C1 N2
C1 H3
C1 H4
C1 H5
N2 O6
N2 O7
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A'

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
11.080 0.040 11.290   webbook

Electron Affinity (eV)
Electron Affinity unc. reference
0.172 0.006 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 1A' CS Os out of place True       3.460 NSRDS-NBS10 MW Cs 2 3
1 2 1A' CS Os in plane False           Cs 2 3
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 CH3NO2 (Methane, nitro-).
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 1A' CS Os out of place True       Cs 2 3
1 2 1A' CS Os in plane False       Cs 2 3

Calculated electric quadrupole moments for CH3NO2 (Methane, nitro-).
Electric dipole polarizability (Å3) polarizability
alpha unc. Reference
4.800   1998Gus/Rui:163

Calculated electric dipole polarizability for CH3NO2 (Methane, nitro-).

References
By selecting the following links, you may be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to [email protected].
squib reference DOI
1975Roh:301 F Rohart "Microwave Spectrum of Nitromethane Internal Rotation Hamiltonian in the Low Barrier Case" J. Mol. Spect. 57, 301-311 (1975) 10.1016/0022-2852(75)90033-8
1976Hellwege(II/7) Hellwege, KH and AM Hellwege (ed.). Landolt-Bornstein: Group II: Atomic and Molecular Physics Volume 7: Structure Data of Free Polyatomic Molecules. Springer-Verlag. Berlin. 1976.  
1993Gor/Cav:4262 D Gorse, D Cavagnat, M Pesquer, C Lapouge "THEORETICAL AND SPECTROSCOPIC STUDY OF ASYMMETRIC METHYL ROTOR DYNAMICS IN GASEOUS PARTIALLY DEUTERATED NITROMETHANES" J. Phys. Chem. 97(17) 4262-4269, 1993 10.1021/j100119a005
1998Gus/Rui:163 M Gussoni, R Rui, G Zerbi "Electronic and relaxation contribution to linear molecular polarizability. An analysis of the experimental values" J. Mol. Struct. 447 (1998) 163-215 10.1016/S0022-2860(97)00292-5
2014Ver/Eme:163-170 SP Verekin, VN Emel'yanenko, V Diky, OV Dorofeeva "Enthalpies of formation of nitromethane and nitrobenzene: New experiments vs. quantum chemical calculations" J. Chem. Thermodynamics 73 (2014) 163–170 10.1016/j.jct.2013.12.013
NSRDS-NBS10 R. D. Nelson Jr., D. R. Lide, A. A. Maryott "Selected Values of electric dipole moments for molecules in the gas phase" NSRDS-NBS10, 1967 10.6028/NBS.NSRDS.10
TRC Frenkel, M; Marsh, K.N.; Wilhoit, R.C.; Kabo, G.J.; Roganov, G.N.,Thermodynamics of Organic Compounds in the Gas State,Thermodynamics Research Center, College Station, TX, 1994  
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

Got a better number? Please email us at [email protected]


Browse
PreviousNext