9633. α,α,β-Trichloro-n-butyraldehyde

Nomenclature

CAS number: 76-36-8
2,2,3-Trichlorobutanal; butylchloral; anhydrous butylchloral; butyrchloral; crotonchloral.
C4H5Cl3O; mol wt 175.44.
C 27.38%, H 2.87%, Cl 60.62%, O 9.12%.

Description and references

Prepd by the action of chlorine on acetaldehyde: Krmer, Pinner, Ber. 3, 883 (1870); Pinner, Ann. 179, 24 (1875); on paraldehyde: idem; on crotonaldehyde after saturation with gaseous HCl: High, US 2280290 (1942); Brown, Plump, US 2351000 (1944). From crotonaldehyde and chlorine: Ropp et al., Org. Synth. coll. vol. IV, 130 (1963).

Chemical structure

Properties

Oily liquid. Pungent, disagreeable odor; d420 1.3956; bp760 164.5-165.5°; bp25 57-60°. nD20 1.47554. Freely sol in water forming butylchloral hydrate; sol in alcohol forming an alcoholate; sol in ether. Polymerizes.