TRIETHOXYSILANE

Product Code: SIT8185.0
CAS No: 998-30-1
SDS Sheets: EU | US
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100 g
$230.00
2 kg
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15 kg
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Prices listed are EXW price (Morrisville, PA US) in USD. Prices vary depending on currency and Incoterms.

Product data and descriptions listed are typical values, not intended to be used as specification.

  • Einecs Number

    213-650-7
  • HMIS

    4-3-1-X
  • Molecular Formula

    C6H16O3Si
  • Molecular Weight (g/mol)

    164.28
  • Purity (%)

    97%
  • TSCA

    Yes
  • Delta H Vaporization (kJ/mol)

    41.9 kcal/mole
  • Boiling Point (˚C/mmHg)

    131-132
  • Density (g/mL)

    0.8753
  • Flash Point (˚C)

    26 °C
  • Melting Point (˚C)

    -170°
  • Refractive Index @ 20˚C

    1.3767
  • Viscosity at 25 ˚C (cSt)

    0.6

Additional Properties

  • Hydrolytic Sensitivity

    7: reacts slowly with moisture/water
  • Surface Tension (mN/m)

    22.3

    • Application

    Review of synthetic utility.1
    Reducing agent.2
    Used to convert alkynes to (E)-alkenes via hydrosilylation-desilylation.3
    Reduces amides to amines in the presence of Zn(OAc)2.4
    Used in the reduction of phosphine oxides to phosphines.5

    Reference

    1. Handbook of Reagents for Organic Synthesis, Reagents for Silicon-Mediated Organic Synthesis, Fuchs, P. L. Ed., John Wiley and Sons, Ltd., 2011, p. 501-505.
    2. Boyer, J. et al. Synthesis 1981, 558.
    3. Trost, B. M. et al. J. Am. Chem. Soc. 2002, 124, 7922.
    4. Dos, S. et al. J. Am. Chem. Soc. 2010, 132, 1770.
    5. Coumbe, T. et al. Tetrahedron Lett. 1994, 35, 625.

    Safety

  • Hazard Info

    ivn mouse, LD50: 180 mg/kg
  • Packaging Under

    Nitrogen

    • Tri-substituted Silane Reducing Agent

    Organosilanes are hydrocarbon-like and possess the ability to serve as both ionic and free-radical reducing agents. These reagents and their reaction by-products are safer and more easily handled and disposed than many other reducing agents. The metallic nature of silicon and its low electronegativity relative to hydrogen lead to polarization of the Si-H bond yielding a hydridic hydrogen and a milder reducing agent compared to aluminum-, boron-, and other metal-based hydrides. A summary of some key silane reductions are presented in Table 1 of the Silicon-Based Reducing Agents brochure.

    Triethoxysilane; Silicon triethoxide; Triethoxysilylhydride

  • CAUTION: VAPORS CAUSE BLINDNESS — GOGGLES MUST BE WORN

  • DISPROPORTIONATES IN PRESENCE OF BASE TO PYROPHORIC PRODUCTS
  • Contains trace Si–Cl for stability
  • ΔHcomb: -4,604 kJ/mol
  • ΔHform: 925 kJ/mol
  • ΔHvap: 175.4 kJ/mol
  • Surface tension: 22.3 mN/m
  • Vapor pressure, 20 °C: 20.2 mm
  • Critical temperature: 244 °C
  • Dipole moment: 1.78 debye
  • Hydrosilylates olefins in presence of Pt
  • Used to convert alkynes to (E)–alkenes via hydrosilylation-desilylation
  • Reduces amides to amines in the presence of Zn(OAc)2
  • Used in the reduction of phosphine oxides to phosphines
  • Reduces esters in the presence of zinc hydride catalyst
  • Reduces aldehydes and ketones to alcohols via the silyl ethers in presence of fluoride ion
  • Gives 1,2 reduction of enones to allyl alcohols
  • Extensive review of silicon based reducing agents: Larson, G.; Fry, J. L. "Ionic and Organometallic-Catalyzed Organosilane Reductions", Wipf, P., Ed.; Wiley, 2007

    • Silicon Chemistry, Articles

    Key Organosilane Reductions – Larson

    The Si-H bond, based on the relative electrongativities of Si and H, is polarised such that the hydrogen is slightly hydridic in nature. The fact that the silanes are not strongly hydridic makes them excellent candidates for mild and selective reductions of organic functional groups.

    Silicon Chemistry, Articles

    Organosilane Reductions with Polymethylhydrosiloxanes – Larson

    The reduction of a comprehensive range of organic functional groups ranging from carboxylic acids to aryl fluorides have been shown to be possible with a variety of organosilanes. A comprehensive review of the ionic and transition metal-catalyzed reductions of organic functional groups has recently appeared.

    Silicon Chemistry, Articles

    Tetramethyldisiloxane: A Practical Organosilane Reducing Agent – Larson

    Silicon Chemistry, Articles

    The Synthesis of Gliflozins – Larson

    Some of the general approaches to the key steps in the synthesis of gliflozins, a class of glucose transporters, are discussed. In particular the glycosidation step for the introduction of the key aryl moiety onto the glucose and the reduction steps are presented.  Click here for more product information on tetramethyldisiloxane (TMDO, TMDS) reducing agent.