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Experimental data for P2 (Phosphorus diatomic)

22 02 02 11 45
INChI INChIKey SMILES IUPAC name
InChI=1S/P2/c1-2/q+1 GSQBFINVLXKPNU-UHFFFAOYSA-N P#[P+]
State Conformation
2Πu D*H
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
1 Σ 667 672 webbook      

Detailed diatomic data
ωe ωexe ωeye Be αe ZPE reference
672.2 2.74 0.276 0.00151 335.4458 2007Iri:389

vibrational zero-point energy: 333.4 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for P2 (Phosphorus diatomic).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
  0.27600   webbook

Calculated rotational constants for P2 (Phosphorus diatomic).
Product of moments of inertia moments of inertia
61.07837amu Å2   1.014246E-38gm cm2
Geometric Data
picture of Phosphorus diatomic

Point Group D∞h


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
rPP 1.986   1 2 webbook re

Cartesians
Atom x (Å) y (Å) z (Å)
P1 0.0000 0.0000 0.0000
P2 0.0000 0.0000 1.9859

Atom - Atom Distances bond lengths
Distances in Å
  P1 P2
P1   1.9859
P2 1.9859  

Calculated geometries for P2 (Phosphorus diatomic).

Bond descriptions


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

Connectivity
Atom 1 Atom 2
P1 P2
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 2   2Πu
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 2Πu D∞h True           D∞h 0 1
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 P2 (Phosphorus diatomic).
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 2Πu D∞h True       D∞h 0 1

Calculated electric quadrupole moments for P2 (Phosphorus diatomic).

References
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squib reference DOI
2007Iri:389 KK Irikura "Experimental Vibrational Zero-Point Energies: Diatomic Molecules" J. Phys. Chem. Ref. Data 36(2), 389, 2007 10.1063/1.2436891
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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