Description
Additional Properties
Hydrolytic Sensitivity 8: reacts rapidly with moisture, water, protic solvents
Surface Tension (mN/m) 14.3 Application Generates chlorosilylene chemistry.1 Carries out thionation and selenation of amides and lactams with elemental sulfur or selenium, respectively.2 Fieser F&F: Vol. 3, p 298; Vol. 4, p 525; Vol. 5, p 688; Vol. 7, p 606; Vol. 11, p 553; Vol. 13, p 322; Vol. 14, p 82; Vol. 18, p 373. Reference 1. Jung, I. N. et al. Organometallics 2003, 22, 2551. 2. Shibahara, F. et al. Org. Lett. 2009, 11, 3064. Safety
Hazard Info oral rat, LD50: 1,030 mg/kg
Flammability Limit 6.9-70.0%
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. Trichlorosilane; Silicochloroform hydrotrichlorosilane
; Silicon chloride hydride; Trichloromonosilane SURFACE TRANSPORT ONLY, UPS FORBIDDEN AIR TRANSPORT FORBIDDEN
Viscosity, 25 °C: 0.23 cSt
ΔHform: -482 kJ/mol
ΔHvap: 28.0 kJ/mol
Dipole moment: 0.97 debye
Specific wetting surface: 240 m2/g
Surface tension: 14.3 mN/m
Specific heat: 1.05 J/g/°C
Coefficient of thermal expansion: 1.9 x 10-3
Vapor pressure, -70 °C: 2.5 mm
Vapor pressure, 14.5 °C: 400 mm
Critical temperature: 234 °C
Critical pressure: 37 atm
Flammability limit: 6.9-70.0%
Undergoes hydrosilylation reactions
Employed in production of high purity silicon metal
Generates chlorosilylene chemistry
Carries out thionation and selenation of amides and lactams with elemental sulfur or selenium, respectively
Will form high-boiling polymeric by-products with aqueous work-up
Reduces aromatic carbonyl systems to give benzyltrichlorosilan
es, which can be desilylated to toluenes
Reduces phosphine oxides to phosphines
Extensive review of silicon based reducing agents: Larson, G.; Fry, J. L. "Ionic and Organometallic-Catal
yzed Organosilane Reductions", Wipf, P., Ed.; Wiley, 2007
