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Experimental data for C6H4Cl2 (1,2-dichlorobenzene)

22 02 02 11 45
Other names
o-Dichlorobenzene; Benzene, o-dichloro-; Benzene, 1,2-dichloro-;
INChI INChIKey SMILES IUPAC name
InChI=1S/C6H4Cl2/c7-5-3-1-2-4-6(5)8/h1-4H RFFLAFLAYFXFSW-UHFFFAOYSA-N ClC1=C(Cl)C=CC=C1 1,2-Dichlorobenzene
State Conformation
1A1 C2V
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 33.00   kJ mol-1 webbook
Hfg(0K) enthalpy of formation     kJ 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
1 A1 3072   1970Gre:1913      
2 A1 3072          
3 A1 1576          
4 A1 1458          
5 A1 1276          
6 A1 1155          
7 A1 1130          
8 A1 1040          
9 A1 660          
10 A1 480          
11 A1 202          
12 A2 975          
13 A2 850          
14 A2 695          
15 A2 504          
16 A2 152          
17 B1 940          
18 B1 748          
19 B1 435          
20 B1 239          
21 B2 3072          
22 B2 3072          
23 B2 1576          
24 B2 1438          
25 B2 1252          
26 B2 1130          
27 B2 1038          
28 B2 740          
29 B2 427          
30 B2 336          

vibrational zero-point energy: 17370.0 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for C6H4Cl2 (1,2-dichlorobenzene).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
0.06438 0.04774 0.02741 1986Ond/Uea:77

Calculated rotational constants for C6H4Cl2 (1,2-dichlorobenzene).
Product of moments of inertia moments of inertia
5.687102E+07amu3Å6   2.60410789875552E-112gm3 cm6
Geometric Data
picture of 1,2-dichlorobenzene

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 C6H4Cl2 (1,2-dichlorobenzene).

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
C:C 6
H-C 4
C-Cl 2

Connectivity
Atom 1 Atom 2
C1 C2
C1 C3
C1 Cl7
C2 C4
C2 Cl8
C3 C5
C3 H9
C4 C6
C4 H10
C5 C6
C5 H11
C6 H12
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A1

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
9.060 0.020     webbook

Electron Affinity (eV)
Electron Affinity unc. reference
0.094   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 1A1 C2v True           C2v 1 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 C6H4Cl2 (1,2-dichlorobenzene).
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 1A1 C2v True       C2v 1 2

Calculated electric quadrupole moments for C6H4Cl2 (1,2-dichlorobenzene).

References
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squib reference DOI
1970Gre:1913 JHS Green "Vibrational spectra of benzene derivatives - IX: o-Disubstituted compounds" Spectrochimica Acta A 1970, 26, 1913-1923 10.1016/0584-8539(70)80129-5
1986Ond/Uea:77 M Onda, M Ueda, M Atsuki, J Yamaguchi, I Yamaguchi "Microwave spectra and structure of 1,2-dichlorobenzene-3d and -4d" J. Mol. Struct. 147 (1986) 77-84 10.1016/0022-2860(86)87060-0
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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