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Experimental data for CH3PH2 (Methyl phosphine)

22 02 02 11 45
Other names
Methylphosphane; Phosphine, methyl-; methylphosphine;
INChI INChIKey SMILES IUPAC name
InChI=1S/CH5P/c1-2/h2H2,1H3 SAWKFRBJGLMMES-UHFFFAOYSA-N PC Methylphosphane
State Conformation
1A' CS
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     kJ mol-1 webbook
Hfg(0K) enthalpy of formation     kJ mol-1 webbook
Entropy (298.15K) entropy     J K-1 mol-1  
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity     kJ mol-1  
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' 3000   1974sve/kov      
2 A' 2938   1974sve/kov      
3 A' 2297   1974sve/kov      
4 A' 1450   1974sve/kov      
5 A' 1238   1974sve/kov      
6 A' 1086   1974sve/kov      
7 A' 977   1974sve/kov      
8 A' 740   1974sve/kov      
9 A' 677   1974sve/kov      
10 A" 2992   1974sve/kov      
11 A" 2312   1974sve/kov      
12 A" 1450   1974sve/kov      
13 A" 1017   1974sve/kov      
15 A" 207   1974sve/kov      

Calculated vibrational frequencies for CH3PH2 (Methyl phosphine).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
       

Calculated rotational constants for CH3PH2 (Methyl phosphine).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of Methyl phosphine

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
rCP 1.858   1 2 1976Hellwege(II/7)
rCH 1.094   1 3 1976Hellwege(II/7)
rPH 1.423   2 6 1976Hellwege(II/7)
aHCP 109.6 2 1 3 1976Hellwege(II/7)
aHPC 96.5 1 2 6 1976Hellwege(II/7) !assumed

These cartesians were determined using some assumed coordinate values. Cartesians
Atom x (Å) y (Å) z (Å)

Atom - Atom Distances bond lengths
Distances in Å
 

Calculated geometries for CH3PH2 (Methyl phosphine).

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
H-P 2
C-P 1

Connectivity
Atom 1 Atom 2
C1 P2
C1 H3
C1 H4
C1 H5
P2 H6
P2 H7
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
9.120   9.620   webbook

Proton Affinity (kJ mol-1)
Proton Affinity unc. Product reference comment
851.5   CH3PH3+ 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 True       1.100 NSRDS-NBS10 MW 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 CH3PH2 (Methyl phosphine).
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 True       Cs 2 3

Calculated electric quadrupole moments for CH3PH2 (Methyl phosphine).

References
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squib reference DOI
1974sve/kov L.M. Sverdlov, M. A. Kovner, E. P. Krainov, "Vibrational Spectra of Polyatomic Molecules" Wiley, New York 1974  
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.  
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
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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