Title: Diphenylketene
CAS Registry Number: 525-06-4
CAS Name: Diphenylethenone
Molecular Formula: C14H10O
Molecular Weight: 194.23
Percent Composition: C 86.57%, H 5.19%, O 8.24%
Line Formula: (C6H5)2C=C=O
Literature References: Prepd from benzil monohydrazone: Smith, Hoehn, Org. Synth. coll. vol. III, 356 (1955).
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.
Boiling point: bp760 265-270° (dec); bp12 146°; bp3.5 119-121°
Index of refraction: nD14.1 1.615
Density: d413.7 1.1107
Diphenylmagnesium Diphenylpyraline Diphetarsone Diphosgene Dipicrylamine

Skeletal formula
Ball-and-stick model
CAS number 525-06-4 YesY
PubChem 123069
ChemSpider 109691 YesY
Jmol-3D images Image 1
Image 2
Molecular formula C14H10O
Molar mass 194.23 g mol−1
Appearance Red/orange oil
Melting point 8–9 °C
Boiling point 118–120 °C at 1mmHg
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Diphenylketene is a chemical of the ketene family. Diphenylketene, like most disubstituted ketenes is a red/orange oil at room temperature and pressure.