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Siloxane-Based 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.
1,3,5,7-Tetramethylcyclotetrasiloxane; TMCTS; Methyl hydrogen cyclic tetramer
EINECS Number: 219-137-4
Alternative Name: D'4; TMCTS
Specific Gravity: 0.9912
Flashpoint: 31°C (88°F)
HMIS Key: 2-3-1-X
Hydrolytic Sensitivity: 3: reacts with aqueous base
Refractive Index: 1.3870
Application: Cyclic monomer- undergoes hydrosilylation reactions.1
Forms hybrid inorganic-organic polymers with dienes suitable for circuit board resins.2
Forms gate dielectrics by CVD.3
Reference: 1. Michalczyk, M. et al. Chem. Mater. 1993, 5, 1687.
2. Leibfried, R. U.S. Patent 4,900,799, 1990.
3. Wang, A. et al. Res. Soc. Symp. Proc. 1997, 424, 281.
Additional Properties: 270?Hcomb: 1,268 kcal/mole278°?Hvap: 42.5 kcal/moleIn presence of oxygen plasma generates SiO2 films for microelectronics