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Product Code: SIP6822.1

Cas No: 2996-92-1

100 g
Arylsilane Cross-Coupling Agent

The cross-coupling reaction is a highly useful methodology for the formation of carbon-carbon bonds. It involves two reagents, with one typically being a suitable organometallic reagent - the nucleophile - and the other a suitable organic substrate, normally an unsaturated halide, tosylate or similar - the electrophile.

Aromatic Hydrophobic Trialkoxy Silane

Aliphatic, fluorinated aliphatic or substituted aromatic hydrocarbon substituents are the hydrophobic entities which enable silanes to induce surface hydrophobicity. The organic substitution of the silane must be non-polar. The hydrophobic effect of the organic substitution can be related to the free energy of transfer of hydrocarbon molecules from an aqueous phase to a homogeneous hydrocarbon phase. A successful hydrophobic coating must eliminate or mitigate hydrogen bonding and shield polar surfaces from interaction with water by creating a non-polar interphase. Although silane and silicone derived coatings are in general the most hydrophobic, they maintain a high degree of permeability to water vapor. This allows coatings to breathe and reduce deterioration at the coating interface associated with entrapped water. Since ions are not transported through non-polar silane and silicone coatings, they offer protection to composite structures ranging from pigmented coatings to rebar reinforced concrete. A selection guide for hydrophobic silanes can be found on pages 22-31 of the Hydrophobicity, Hydrophilicity and Silane Surface Modification brochure.

Phenyltrimethoxysilane; Trimethoxysilylbenzene
  • Viscosity, 25 °C: 2.1 cSt
  • Vapor pressure, 108 °: 20 mm
  • Dipole moment: 1.77
  • Dielectric constant: 4.44
  • Cross-couples w/ aryl bromides w/o fluoride and w/ NaOH
  • High yields w/ Pd and carbene ligands
  • Cross-coupled in presence of aryl aldehyde
  • Undergoes 1,4-addition to enones. 1,2- and 1,4-addition to aldehyde undergoes coupling and asymmetric coupling w/ α-bromoesters
  • Reacts with 2° amines to give anilines
  • N-arylates nitrogen heterocycles
  • Cross-coupled w/ alkynyl bromides and iodides
  • Intermediate for high temperature silicone resins
  • Hydrophobic additive to other silanes with excellent thermal stability
  • Cross couples with aryl halides
  • Phenylates heteroaromatic carboxamides
  • Directly couples with primary alkyl bromides and iodides
  • Converts arylselenyl bromides to arylphenylselenides
  • Used in nickel-catalyzed direct phenylation of C-H bonds in heteroaromatic systems, benzoxazoles
  • Immobilization reagent for aligned metallic single wall nanotubes (SWNT)
  • Standard grade available, SIP6822.0
  • Extensive review of silicon based cross-coupling agents: Denmark, S. E. et al. "Organic Reactions, Volume 75" Denmark, S. E. ed., John Wiley and Sons, 233, 2011
  • EINECS Number: 221-066-9

    Specific Gravity: 1.064

    Flashpoint: 86°C (187°F)

    HMIS Key: 3-2-1-X

    Hydrolytic Sensitivity: 7: reacts slowly with moisture/water

    Formula: C9H14O3Si


    Refractive Index: 1.4734