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Diphenylacetylene is the chemical compound C 6 H 5 C≡CC 6 H 5. The molecule consists of two phenyl groups attached to a C 2 unit. A colorless solid, it is used as a building block in organic synthesis and as a ligand in organometallic chemistry .
102.133 g/mol Density: 0.93 g/cm 3: Melting point: −45 °C (−49 °F; 228 K) Boiling point: 142 to 144 °C (288 to 291 °F; 415 to 417 K) Acidity (pK a)
340.058 g·mol −1 Appearance White solid Melting point: 241 °C ... Reaction of stilbene dibromide with base gives diphenylacetylene. [4] References
— "Values ranging from 21.3 to 21.5 gm/cm 3 at 20 °C have been reported for the density of annealed platinum; the best value being about 21.45 gm/cm 3 at 20 °C." 21.46 g/cm 3 — Rose, T. Kirke. The Precious Metals, Comprising Gold, Silver and Platinum .
(E)-Stilbene, commonly known as trans-stilbene, is an organic compound represented by the condensed structural formula C 6 H 5 CH=CHC 6 H 5.Classified as a diarylethene, it features a central ethylene moiety with one phenyl group substituent on each end of the carbon–carbon double bond.
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Combustion of acetylene with oxygen produces a flame of over 3,600 K (3,330 °C; 6,020 °F), releasing 11.8 kJ/g. Oxygen with acetylene is the hottest burning common gas mixture. [ 32 ] Acetylene is the third-hottest natural chemical flame after dicyanoacetylene 's 5,260 K (4,990 °C; 9,010 °F) and cyanogen at 4,798 K (4,525 °C; 8,177 °F).
Density: 0.709 g/mL [1] Boiling point: 53 °C (127 °F; 326 K) ... Trimethylsilylacetylene is also used to synthesize diphenylacetylene derivatives in a one-pot ...