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Experimental data for CH3C6H4CH3 (paraxylene)

22 02 02 11 45
Other names
Benzene, 1,4-dimethyl-; p-Xylene; p-Dimethylbenzene; p-Xylol; 1,4-Dimethylbenzene; 1,4-Xylene; p-Methyltoluene; para-Xylene; Chromar; Scintillar; 4-Methyltoluene; 1,4-dimethyl-benzene;
INChI INChIKey SMILES IUPAC name
InChI=1S/C8H10/c1-7-3-5-8(2)6-4-7/h3-6H,1-2H3 URLKBWYHVLBVBO-UHFFFAOYSA-N CC1=CC=C(C)C=C1 p-Xylene
State Conformation
1Ag C2H
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 17.90 1.00 kJ mol-1 webbook
Hfg(0K) enthalpy of formation   1.00 kJ mol-1 webbook
Heat Capacity (298.15K) heat capacity 126.00   J K-1 mol-1 webbook
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 CH3C6H4CH3 (paraxylene).
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 CH3C6H4CH3 (paraxylene).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of paraxylene

Point Group C2v


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 CH3C6H4CH3 (paraxylene).

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
C-C 2
C:C 6
H-C 10

Connectivity
Atom 1 Atom 2
C1 C2
C1 C6
C1 C11
C2 C3
C2 H7
C3 C4
C3 H8
C4 C5
C4 C12
C5 C6
C5 H9
C6 H10
C11 H13
C11 H14
C11 H15
C12 H16
C12 H17
C12 H18
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
8.440 0.050     webbook

Electron Affinity (eV)
Electron Affinity unc. reference
0.002 0.000 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 C2h True           C2 1 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 CH3C6H4CH3 (paraxylene).
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 C2h True       C2 1 3

Calculated electric quadrupole moments for CH3C6H4CH3 (paraxylene).
Electric dipole polarizability (Å3) polarizability
alpha unc. Reference
14.260   1990Mil:8533

Calculated electric dipole polarizability for CH3C6H4CH3 (paraxylene).

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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