1,3,5,7-TETRAMETHYLCYCLOTETRASILOXANE

CAS: 2370-88-9

Ref. 3H-SIT7530.0

Product Information

• Name: 1,3,5,7-TETRAMETHYLCYCLOTETRASILOXANE
• Synonyms: D'4; TMCTS
• Brand: Gelest
• Description: Siloxane-Based Silane Reducing AgentOrganosilanes 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 tetramerΔHcomb: 5,308 kJ/molΔHvap: 177.9 kJ/molVapor pressure, 20 °C: 7.0 mmCritical temperature: 278 °CHigh molecular weight silane reducing agentIn presence of oxygen plasma generates SiO2 films for microelectronicsCyclic monomer- undergoes hydrosilylation reactionsForms hybrid inorganic-organic polymers with dienes suitable for circuit board resinsForms gate dielectrics by CVDExtensive review of silicon based reducing agents: Larson, G.; Fry, J. L. "Ionic and Organometallic-Catalyzed Organosilane Reductions", Wipf, P., Ed.; Wiley, 2007

Chemical properties

• Molecular weight: 240.51
• Formula: C₄H₁₆O₄Si₄
• Purity: 97%
• Color/Form: Colourless Liquid