40934-68-7

Basic information

• Product Name: Dimethyloctylsilane
• Synonyms: Octyl Dimethylsilane;Dimethyloctylsilane
• CAS NO: 40934-68-7
• Molecular Formula: C₁₀H₂₄Si
• Molecular Weight: 172.3831
• Mol File: 40934-68-7.mol
• Article Data: 10

Chemical Properties

• Boiling Point: 188.178 °C at 760 mmHg
• Flash Point: 58.022 °C
• Appearance: /
• Density: 0.7579 g/cm3
• Refractive Index: 1.4262
• CAS DataBase Reference: Dimethyloctylsilane(CAS DataBase Reference)
• NIST Chemistry Reference: Dimethyloctylsilane(40934-68-7)
• EPA Substance Registry System: Dimethyloctylsilane(40934-68-7)

Safety Data

• Hazardous Substances Data: 40934-68-7(Hazardous Substances Data)

Usage

General Description

Dimethyloctylsilane, also known as DMO, is an organosilicon compound widely used as a surface modifier in various industrial processes. It is a clear, colorless liquid with a chemical formula C10H24Si and a molecular weight of 184.4 g/mol. DMO is commonly used as a coating agent for surfaces to improve their water repellency and chemical resistance. It is also utilized as a coupling agent in the production of polymers and as a component in the manufacturing of adhesives, sealants, and coatings. Additionally, DMO is employed as a reactive diluent in the formulation of silicone-based materials, such as sealants and rubber products. Its properties make it a versatile and valuable chemical in a wide range of applications across different industries.

Upstream product

• 111-66-0 oct-1-ene 
• 80204-10-0 methyloctylsilane 
• 2441-21-6 iododimethylsilane 
• 14403-26-0 dioctylzinc 
• 1070-00-4 trioctylaluminum 
• 1066-35-9 dimethylmonochlorosilane 
• 93804-29-6 n-octyl(methoxy)dimethylsilane 
• 25015-63-8 4,4,5,5-tetramethyl-[1,3,2]-dioxaboralane 
• 1111-74-6 dimethylsilane 
• 18162-84-0 dimethyl-n-octylchlorosilane 

Relevant articles and documents

Transition metal-catalyzed hydrosilylation of polybutadiene – The effect of substituents at silicon on efficiency of silylfunctionalization process

Herein we present the results of our studies on the hydrosilylation of polybutadiene with alkyl, aryl and alkoxysilanes in the presence of platinum and rhodium complexes. In order to select the most efficient catalytic system, which, under optimal conditions, would smoothly promote incorporation of the above-mentioned organosilicon modifiers into polybutadienes of various structures via hydrosilylation, the real-time in-situ FT-IR spectroscopy was used. The silyl-functionalized polymeric products were characterized by NMR analysis and gel permeation chromatography (GPC). It was demonstrated that the stereo-electronic properties of substituents directly bonded to the HSi moiety play a crucial role in formation of desired products, as well as affect the time required for total conversion of organosilicon reagents. Partially modified polymers containing pendant alkoxy groups can be applied as additives to rubber compounds to enhance dispersion of inorganic particles in the polymer matrix, as well as to promote formation of organic-inorganic hybrid materials.

Catalytic Reduction of Alkoxysilanes with Borane Using a Metallocene-Type Yttrium Complex

The catalytic reduction of alkoxysilanes with the borane HBpin (pin = pinacolato) was achieved using a metallocene-type yttrium complex as a catalyst precursor. Mechanistic study supported the pivotal role of the rigid metallocene structure of the catalyst, which bears two bulky n5-C5Me4SiMe3 ligands, in suppressing the coordination of the side product MeOBpin that is generated during the reaction.

Synthesis of hydrosilanes: Via Lewis-base-catalysed reduction of alkoxy silanes with NaBH4

Hydrosilanes were synthesized by reduction of alkoxy silanes with BH3 in the presence of hexamethylphosphoric triamide (HMPA) as a Lewis-base catalyst. The reaction was also achieved using an inexpensive and easily handled hydride source NaBH4, which reacted with EtBr as a sacrificial reagent to form BH3in situ.