Cyclohexene
Title: Cyclohexene
CAS Registry Number: 110-83-8
Additional Names: 1,2,3,4-Tetrahydrobenzene
Molecular Formula: C6H10
Molecular Weight: 82.14
Percent Composition: C 87.73%, H 12.27%
Literature References: Occurs in coal tar. Prepd by dehydration of cyclohexanol at high temps over various catalysts. Lab prepn using H2SO4 as dehydrating agent: Coleman, Johnstone, Org. Synth. 5, 33 (1925); Wagner, J. Chem. Educ. 10, 113 (1933); by distn of cyclohexanol over silica gel or alumina: Hershberg, Ruhoff, Org. Synth. 17, 25 (1937).
Properties: Liquid. d420 0.8098; d50 0.7823; d100 0.7355. mp -103.5°. bp760 83°. nD20 1.4465; nD27 1.4428. Absorption spectrum: Purvis, Proc. Cambridge Philos. Soc. 23, 588 (1927); Chem. Zentralbl. 1927, II, 379; cf. Hartley, Dobbie, J. Chem. Soc. 77, 846 (1900).
Melting point: mp -103.5°
Boiling point: bp760 83°
Index of refraction: nD20 1.4465; nD27 1.4428
Density: d420 0.8098; d50 0.7823; d100 0.7355
CAUTION: Potential symptoms of overexposure are irritation of eyes, respiratory system and skin; drowsiness. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 84.
Use: Alkylation component. In the manuf of adipic acid, maleic acid, hexahydrobenzoic acid and aldehyde. To prepare butadiene in the laboratory. Has been suggested for the synthesis of maleic acid and as stabilizer for high octane gasoline.

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