Nomenclature
CAS number: 90-47-1
9
H-Xanthen-9-one; 9-oxoxanthene; diphenylene ketone oxide; dibenzo-γ-pyrone; Genicide.
C
13H
8O
2; mol wt 196.20.
C 79.58%, H 4.11%, O 16.31%.
Description and references
Prepd by heating phenyl salicylate: Graebe, Ann. 254, 279 (1889); Holleman, Org. Synth. coll. vol. I (2nd
ed., 1941) p 552.
Properties
Polymorphic needles from alcohol, mp 174°. bp730 351°. Sparingly volatile
with steam. Dipole moment 3.0. Solubility: 0.55 g/100 ml of cold
alcohol; 6.71 g/100 ml of boiling alcohol. Freely sol in chloroform.
Slightly sol in hot water, ether, petr ether, benzene, toluene, xylene.
Dissolves in concd H2SO4 to a yellow soln with
pale blue fluorescence.Derivative
Oxime.
Properties
mp 161°.Use
In the prepn of xanthydrol. Ovicide for codling
moth eggs; less effective as larvicide.