18546-93-5

Basic information

• Product Name: disiloxane, 1,3-dihexyl-1,1,3,3-tetramethyl-
• Synonyms: 1,3-Dihexyl-1,1,3,3-tetramethyldisiloxane
• CAS NO: 18546-93-5
• Molecular Formula: C₁₆H₃₈OSi₂
• Molecular Weight: 302.6433
• Mol File: 18546-93-5.mol
• Article Data: 3

Chemical Properties

• Boiling Point: 286.893°C at 760 mmHg
• Flash Point: 113.542°C
• Density: 0.817g/cm³
• Vapor Pressure: 0.004mmHg at 25°C
• Refractive Index: 1.428
• CAS DataBase Reference: disiloxane, 1,3-dihexyl-1,1,3,3-tetramethyl-(CAS DataBase Reference)
• NIST Chemistry Reference: disiloxane, 1,3-dihexyl-1,1,3,3-tetramethyl-(18546-93-5)
• EPA Substance Registry System: disiloxane, 1,3-dihexyl-1,1,3,3-tetramethyl-(18546-93-5)

Safety Data

• Hazardous Substances Data: 18546-93-5(Hazardous Substances Data)

Upstream product

• 3634-59-1 dimethylhexylsilyl chloride 
• 59551-89-2 hexyldimethylsilanol 
• 592-41-6 1-hexene 
• 1066-35-9 dimethylmonochlorosilane 
• 3277-26-7 1,1,3,3-Tetramethyldisiloxane 

Downstream Products

• 3429-62-7 trimethylhexylsilane 

Relevant articles and documents

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Olefin isomerization and hydrosilylation catalysis by lewis acidic organofluorophosphonium salts

Organofluorophosphonium salts of the formula [(C6F 5)3-xPhxPF][B(C6F5) 4] (x = 0, 1) exhibit Lewis acidity derived from a low-lying σ* orbital at P opposite F. This acidity is evidenced by the reactions of these salts with olefins, which catalyze the rapid isomerization of 1-hexene to 2-hexene, the cationic polymerization of isobutylene, and the Friedel-Crafts-type dimerization of 1,1-diphenylethylene. In the presence of hydrosilanes, olefins and alkynes undergo efficient hydrosilylation catalysis to the alkylsilanes. Experimental and computational considerations of the mechanism are consistent with the sequential activation and 1,2-addition of hydrosilane across the unsaturated C-C bonds.