66548-22-9

Basic information

• Product Name: BIS(T-BUTYLDIMETHYLSILOXY)ETHANE
• Synonyms: BIS(T-BUTYLDIMETHYLSILOXY)ETHANE;1,2-BIS(t-BUTYLDIMETHYLSILOXY)ETHANE;2,2,3,3,8,8,9,9-Octamethyl-4,7-dioxa-3,8-disiladecane;1,2-Bis(tert-butyldimethylsilyloxy)ethane
• CAS NO: 66548-22-9
• Molecular Formula: C14H34O2Si2
• Molecular Weight: 290.59
• EINECS: 200-158-5
• Mol File: 66548-22-9.mol
• Article Data: 4

Chemical Properties

• Melting Point: 45-46°C
• Boiling Point: 253.8±13.0 °C(Predicted)
• Appearance: /
• Density: 0.844±0.06 g/cm3(Predicted)
• Storage Temp.: 2-8°C
• CAS DataBase Reference: BIS(T-BUTYLDIMETHYLSILOXY)ETHANE(CAS DataBase Reference)
• NIST Chemistry Reference: BIS(T-BUTYLDIMETHYLSILOXY)ETHANE(66548-22-9)
• EPA Substance Registry System: BIS(T-BUTYLDIMETHYLSILOXY)ETHANE(66548-22-9)

Safety Data

• Hazardous Substances Data: 66548-22-9(Hazardous Substances Data)

Usage

General Description

BIS(T-BUTYLDIMETHYLSILOXY)ETHANE is a chemical compound consisting of ethane molecules with two t-butyldimethylsiloxy groups attached. BIS(T-BUTYLDIMETHYLSILOXY)ETHANE is commonly used as a crosslinking agent in the production of silicone elastomers and resins. It acts as a coupling agent to improve the mechanical properties and heat resistance of silicone materials. BIS(T-BUTYLDIMETHYLSILOXY)ETHANE is also utilized as a lubricant additive and as a surface treatment agent for various materials. Additionally, it is known for its water repellent properties, making it useful for applications in waterproof coatings and sealants.

Upstream product

• 107-21-1 ethylene glycol 
• 18162-48-6 tert-butyldimethylsilyl chloride 

Relevant articles and documents

Synthesis method of 1, 2-bis (alkyl-siloxy) ethane

The invention provides a synthesis method of 1, 2-bis (alkyl-siloxy) ethane, and belongs to the technical field of battery electrolytic solution additives. The method comprises the following steps: adding dichloromethane and ethylene glycol into a reaction kettle, cooling to 15 DEG C or below, adding imidazole, continuously cooling to -15 DEG C or below, starting to dropwise add vinyl dimethyl chlorosilane or tert-butyl dimethyl chlorosilane or trimethylchlorosilane, controlling the temperature in the dropwise adding process to range from -15 DEG C to -25 DEG C, after dropwise adding is completed for 1.8-2.2 h, washing the system with water, carrying out liquid separation, drying, carrying out suction filtration, collecting dichloromethane under reduced pressure, and rectifying to obtain 1, 2-bis (dimethyl vinyl siloxy) ethane or 1, 2-bis (tert-butyl dimethyl siloxy) ethane or 1, 2-bis (trimethyl siloxy) ethane. The synthesis method is simple, and the yield of the synthesized product is high.

Silicon-29 NMR spectra of tert-butyldimethylsilyl and trimethylsilyl derivatives of some non-rigid diols

29Si NMR spectra of trimethylsilyl (TMS) and tert-butyldimethylsilyl (TBDMS) derivatives of selected diols were measured under standardized conditions (i.e., in diluted CDCl3 solutions). Application of the recently reported correlation between the chemical shifts in TMS and TBDMS derivatives revealed considerable and systematic deviations which exceeded experimental errors and error estimates from the correlation. Two possible explanations of the deviations are considered: interaction between the two bulky substituent groups and invalidity of the reported correlation for simple hydroxy derivatives. An independent study of analogous derivatives of monohydroxy compounds has shown that the linear correlation holds but the slope and intercept are significantly different from those reported previously on the basis of a study of amino acid derivatives. The data obtained for the diol derivatives fit the new correlation very well and no indication of an interaction between the bulky TBDMS groups was noticed. However, deviations do occur in branched diol derivatives in which branching reduces accessibility of the oxygen atoms surface to associate with proton donors. The largest deviation was found when intramolecular hydrogen bond was formed.