3326. Diphenylketene

Nomenclature

CAS number: 525-06-4
2,2-Diphenylethenone.
C14H10O; mol wt 194.23.
C 86.57%, H 5.19%, O 8.24%.

Description and references

Prepd from benzil monohydrazone: Smith, Hoehn, Org. Synth. coll. vol. III, 356 (1955).

Chemical structure

Properties

Reddish-yellow liquid. Best stored under nitrogen. The addition of hydroquinone helps to retard polymerization. Solidifies in refrigerator. d413.7 1.1107. bp760 265-270° (dec); bp12 146°; bp3.5 119-121°. Should be distilled under reduced pressure (3 to 5 mm) in an atm of nitrogen. nD14.1 1.615. Dipole moment in benzene at 25° = -1.9.