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Experimental data for C18H12 (Tetracene)

22 02 02 11 45
Other names
Naphthacene; 2,3-Benzanthracene; Benzo[b]anthracene; Chrysogen;
INChI INChIKey SMILES IUPAC name
InChI=1S/C18H12/c1-2-6-14-10-18-12-16-8-4-3-7-15(16)11-17(18)9-13(14)5-1/h1-12H IFLREYGFSNHWGE-UHFFFAOYSA-N C12=CC(C=CC=C3)=C3C=C1C=C4C(C=CC=C4)=C2 Tetracene
State Conformation
1AG D2H
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 342.60 5.90 kJ mol-1 webbook low quality
Hfg(0K) enthalpy of formation   5.90 kJ mol-1 webbook low quality
Entropy (298.15K) entropy 233.40 1.50 J K-1 mol-1 webbook estimate
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 C18H12 (Tetracene).
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 C18H12 (Tetracene).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of Tetracene

Point Group D2h


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

Cartesians
Atom x (Å) y (Å) z (Å)

Atom - Atom Distances bond lengths
Distances in Å
 

Calculated geometries for C18H12 (Tetracene).

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
C:C 21
H-C 12

Connectivity
Atom 1 Atom 2
C1 C2
C1 C3
C1 C4
C2 C5
C2 C6
C3 C7
C3 H19
C4 C8
C4 H20
C5 C9
C5 H21
C6 C10
C6 H22
C7 C9
C7 C11
C8 C10
C8 C12
C9 C13
C10 C14
C11 C15
C11 H23
C12 C16
C12 H24
C13 C17
C13 H25
C14 C18
C14 H26
C15 C17
C15 H27
C16 C18
C16 H28
C17 H29
C18 H30
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1AG

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
6.970 0.050     webbook

Electron Affinity (eV)
Electron Affinity unc. reference
1.058 0.005 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 1AG D2h True           D2h 0 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 C18H12 (Tetracene).
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 1AG D2h True       D2h 0 2

Calculated electric quadrupole moments for C18H12 (Tetracene).
Electric dipole polarizability (Å3) polarizability
alpha unc. Reference
32.270   1990Mil:8533

Calculated electric dipole polarizability for C18H12 (Tetracene).

References
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squib reference DOI
1990Mil:8533 KJ Miller "Additivity Methods in Molecular Polarizability" J. Am. Chem. Soc. 1990, 112, 8533-8542 10.1021/ja00179a044
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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