Chlorotoluene

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Chlorotoluene is a group of three isomeric chemical compounds. They (ortho-chlorotoluene, meta-chlorotoluene, and para-chlorotoluene) consist of a disubstituted benzene ring with one chlorine atom and one methyl group.

Chemical properties

The isomers differ in the location of the chlorine, but have the same chemical formula. All have very similar boiling points, although p-chlorotoluene has a much higher melting point due to a more tightly-packed crystal structure.

Chlorotoluene Isomers
General
Common name o-chlorotoluene m-chlorotoluene p-chlorotoluene
Structure O-Chlortoluol.svg M-Chlortoluol.svg P-Chlortoluol.svg
Systematic name 1-chloro-2-methylbenzene 1-chloro-3-methylbenzene 1-chloro-4-methylbenzene
Molecular formula C7H7Cl (C6H4ClCH3)
Molar mass 126.586 g/mol
Appearance colorless liquid
CAS number [95-49-8] [108-41-8] [106-43-4]
Properties
Density and phase 1.073 g/mL, liquid 1.072 g/mL, liquid 1.069 g/mL, liquid
Solubility in water practically insoluble
Other solubilities Soluble in non-polar solvents such as aromatic hydrocarbons
Melting point −35 °C (−31 °F; 238 K) −47 °C (−52.6 °F; 226 K) 7 °C (44.6 °F; 280 K)
Boiling point 159 °C (318.2 °F; 432 K) 162 °C (323.6 °F; 435 K) 162 °C (323.6 °F; 435 K)
Magnetic Susceptibility -81.98 x 10−6 cm3/mol -80.07 x 10−6 cm3/mol -80.07 x 10−6 cm3/mol

Benzyl chloride is an isomer, which has a chlorine substituted for one of the hydrogens of toluene's methyl group, and it is sometimes named α-chlorotoluene.

References

  • CDC - NIOSH Pocket Guide to Chemical Hazards - o-Chlorotoluene
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