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Structural formula
Structural formula of diphenylsilane
Surname Diphenylsilane
other names


Molecular formula C 12 H 12 Si
Brief description

light yellow clear liquid

External identifiers / databases
CAS number 775-12-2
EC number 212-271-4
ECHA InfoCard 100.011.156
PubChem 6327659
Wikidata Q21045149
Molar mass 184.31 g mol −1
Physical state



0.993 g cm ? 3 (25 ° C )

Melting point

<20 ° C

boiling point

95–97 ° C (at 17 hPa )

Refractive index


safety instructions
GHS labeling of hazardous substances
07 - Warning


H and P phrases H: 315
P: no P-phrases
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

Diphenylsilane is a chemical compound from the group of organosilicon compounds .

Extraction and presentation

Diphenylsilane can be prepared by hydrogenation of dichlorodiphenylsilane with a reducing agent such as lithium aluminum hydride or lithium hydride are obtained:

Diphenylsilane can also be produced by electrochemical reduction of dichlorodiphenylsilane on a mercury electrode in 1,2-dimethoxyethane . In addition, diphenylsilane can be produced from the reaction of phenylsilane with the Grignard reagent phenylmagnesium bromide at an elevated temperature in tetrahydrofuran as a solvent:


Compared to the equivalent hydrocarbon compound diphenylmethane , diphenylsilane is much more easily oxidized and reacts with metal oxides, such as mercury (II) oxide , to form the corresponding diphenylsilanediol :

Silanes such as diephenylsilane are essentially stable to hydrolysis . But in the presence of acidic and basic catalysts , such as triethylamine or potassium hydroxide , it is converted to silanediol with evolution of hydrogen :


Diphenylsilane reacts with elemental sulfur to form the heterocyclic 6-ring hexaphenylcyclotrisilthiane.

safety instructions

Diphenylsilane's flash point is 98 ° C.

Individual evidence

  1. a b c d e f g Datasheet Diphenylsilane from Sigma-Aldrich , accessed on September 22, 2018 ( PDF ).
  2. a b Entry on diphenylsilane at ChemicalBook , accessed on July 5, 2015.
  3. ^ Didier Astruc: Organometallic Chemistry and Catalysis. Springer Science & Business Media, 2007, ISBN 978-3-540-46129-6 , p. 329 ( limited preview in Google book search).
  4. a b c Barry Arkles: Silanes. (pdf) Reprint from Kirk-Othmer Encyclopedia of Chemical Technology, Forth Edition, Volume 22, pages 38-69. In: Gelest. Pp. 44ff , accessed on December 10, 2016 (English).
  5. Jürgen Bracht: Houben-Weyl Methods of Organic Chemistry Vol. IV / 1d, 4th Edition. Georg Thieme Verlag, 2014, ISBN 978-3-131-79714-8 , p. 702 ( limited preview in the Google book search).
  6. Franz Fehér and Rolf Lüpschen: New synthesis of phenyl-substituted cyclic silicon-sulfur compounds. In: Journal of Nature Research B . 26, 1971, pp. 1191-1192 ( online ).