Title: Chalcone
CAS Registry Number: 94-41-7
CAS Name: 1,3-Diphenyl-2-propen-1-one
Additional Names: chalkone; benzylideneacetophenone; benzalacetophenone; phenyl styryl ketone
Molecular Formula: C15H12O
Molecular Weight: 208.26
Percent Composition: C 86.51%, H 5.81%, O 7.68%
Line Formula: C6H5CH=CHCOC6H5
Literature References: Prepd by the action of NaOH on an alcoholic soln of benzaldehyde and acetophenone: E. P. Kohler, H. M. Chadwell, Org. Synth. coll. vol. I, 78 (1941).
Properties: Pale-yellow orthorhombic prisms from petr ether. mp 57-58°. d462 1.0712. bp760 345-348° (slight decompn). bp25 208°. nD62 1.6458. Freely sol in ether, chloroform, carbon bisulfide, benzene; slightly in alcohol; very sparingly in cold petr ether.
Melting point: mp 57-58°
Boiling point: bp760 345-348° (slight decompn); bp25 208°
Index of refraction: nD62 1.6458
Density: d462 1.0712
CAUTION: Skin irritant.
NOTE: Exists in other forms (polymorphic) with different mps. Irradiation produces four forms of dimers.

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