Pyrene Index

General properties

Symmetry point group D2h
Symmetry elements E     C2(z)     C2(y)     C2(x)     i     &sigmah(xy)     &sigmah(xz)     &sigmah(yz)
Irriducible representation &Gamma3N 13 Ag + 13 B1g + 5 B2g + 8 B3g + 5 Au + 8 B1u + 13 B2u + 13 B3u
Irriducible representation &Gammavib 13 Ag + 12 B1g + 4 B2g + 7 B3g + 5 Au + 7 B1u + 12 B2u + 12 B3u
Infrared active modes 7 B1u + 12 B2u + 12 B3u
Single ionization energy (eV)
Adiab. = 7.07 Vert. = 7.14 (Exp. 7.426 ± 0.001)
Double ionization energy (eV)
Singlet: Adiab. = 18.63 Vert. = 18.92 (Exp. 19.8 ± 0.2 )
Triplet: Adiab. = 19.35 Vert. = 19.44
Electron affinity (eV)
Adiab. = 0.41 Vert. = 0.31 (Exp. 0.406 ± 0.010)
Zero Point Energies (kcal/mol)
Anion = 129 Neutral = 132 Cation = 132 Dication S = 132
Static dipole polarizabilities (Å3)
Anion: &alphaxx = 53 &alphayy = 39 &alphazz = 17
Neutral: &alphaxx = 45 &alphayy = 32 &alphazz = 14
Cation: &alphaxx = 43 &alphayy = 33 &alphazz = 12
Dication S: &alphaxx = 41 &alphayy = 33 &alphazz = 11
Rotational constants(cm-1)
Anion: A = 3.373e-02 B = 1.815e-02 C = 1.180e-02
Neutral: A = 3.364e-02 B = 1.847e-02 C = 1.192e-02
Cation: A = 3.393e-02 B = 1.837e-02 C = 1.192e-02
Dication S: A = 3.408e-02 B = 1.821e-02 C = 1.187e-02
Dication T: A = 3.303e-02 B = 1.858e-02 C = 1.189e-02
van der Waals coefficients (a.u.)#
Average static polarizability &alpha(0) = 205
Effective frequency &omega1 = 0.380
Homomolecular Hamaker constant (x10-3) C6 = 12.0
Coefficient of the retardated vdW interaction (x10-6) KAA = 1.68

#The full set of C6pyrene, PAH for all PAHs in the database can be found here


Pyrene Index