18209-83-1

Basic information

• Product Name: 1,2-DIBROMOTETRAMETHYLDISILANE, tech-95
• Synonyms: 1,2-DIBROMOTETRAMETHYLDISILANE, tech-95;1,2-DIBROMOTETRAMETHYLDISILANE;1,2-Dibromo-1,1,2,2-Tetramethyldisilane
• CAS NO: 18209-83-1
• Molecular Formula: C₄H₁₂Br₂Si₂
• Molecular Weight: 276.11708
• Mol File: 18209-83-1.mol

Chemical Properties

• Melting Point: 40°C
• Boiling Point: 79°C / 30
• Appearance: /
• CAS DataBase Reference: 1,2-DIBROMOTETRAMETHYLDISILANE, tech-95(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2-DIBROMOTETRAMETHYLDISILANE, tech-95(18209-83-1)
• EPA Substance Registry System: 1,2-DIBROMOTETRAMETHYLDISILANE, tech-95(18209-83-1)

Safety Data

• Hazardous Substances Data: 18209-83-1(Hazardous Substances Data)

Upstream product

• 1450-14-2 1,1,1,2,2,2-hexamethyldisilane 
• 4098-30-0 dodecamethylcyclohexasilane 
• 1145-98-8 1,2-diphenyltetramethyldisilane 

Downstream Products

• 814-98-2 1,1,2,2-tetramethyldisilane 

Relevant articles and documents

Synthesis of α,ω-dihalopermethyloligosilanes and silane-siloxane copolymers

α,ω-Dibromopermethyloligosilanes, Br(SiMe2)nBr (n = 2-4, 6), were prepared by the reaction of dodecamethylcyclohexasilane with bromine. The reaction of (Me2Si)6 with MCl4 (M = Sn, Ti) proceeds with the cleavage of Si-Si-and Si-C-bonds with the formation of α,ω-dichloropermethyloligosilanes, Cl(SiMe2)nCI (n = 2-4, 6), and chloro derivatives of cyclohexasilane, ClmSi6Me12-m (m = 1, 2). Silane-siloxane copolymers of regular structure were obtained by heterofunctional copolycondensation of α,ω-dihalopermethyloligosilanes with 1,5-dihydroxyhexamethyltrisiloxane.

Preparation of oligosilanes containing perhalogenated silyl groups (-SiX3, -SiX2-, >SiX-, X = Cl, Br) and their hydrogenation by stannanes

Starting from methylphenylsubstituted oligosilanes the disilanes SiX3-SiXi,Me3-i (i = 0, 1, 2; X = Cl, Br), trisilanes SiX2(SiXiMe3-i) (i = 0, 1) and branched tetrasilanes SiX(SiXMe2)3 were synthesized and their behavior towards the Lewis-base catalyzed hydrogenation by stannanes was investigated. In the case of methylchlorodisilanes SiCl3-SiCliMe3-i Si-Si bond cleavage competes with the hydrogenation reaction.

Continued search for elusive persistent trivalent organosilyl cations: The claimed trimethylsilyl cation revisited. Attempted preparation of cyclic and halogen-bridged organosilicenium ions

Comparison of ab initio/IGLO calculated 1H, 13C, and 29Si NMR chemical shifts with the experimental data on trimethylsilyl perchlorete and related derivatives supports the conclusion that no long-lived persistent trimethyl

Ligand Exchange Reactions between Haloboranes and Alkylsilanes

In a ligand exchange reaction between BHal3 (Hal = Cl, Br) and the tetraalkylsilanes Et4Si, (Me3Si)2CH2 or Ph2CHSiMe3 the alkylhaloboranes EtBBr2 or MeBHal2 and the alkylhalosilanes Et3SiBr, HalMe2Si-CH2-SiMe3, (HalMe2Si)2CH2, and Ph2CHSiMe2Br, respectively, are formed.Similarly, the methyloligosilanes (Me3Si)2 (1) and (Me3Si)2SiMe2 (2) react with BHal3 (Hal = Cl, Br, I) via methyl-halogen-transfer to give HalMe2Si-SiMe3 (Hal = Cl, Br, I), (HalMe2Si)2 (Hal = Br, I), HalMe2Si-SiMe2-SiMe3, (Me3Si)2SiMeHal, HalMe2Si-SiMeHal-SiMe3, (HalMe2Si)SiMe2 (Hal = Cl, Br) or (BrMe2Si)2SiMeBr besides MeBHal2 (Hal = Cl, Br, I) and Me2BI, respectively.

The Mechanism of the Reaction of Molecular Bromine with Organosilicon Hydrides

The kinetics of the bromination of 7 triarylsilanes and 14 other organosilicon hydrides by molecular bromine in CCl4 have been determined by the stopped flow method.For triethylsilane, Arrhenius parameters have been measured in octane and CCl4, and solvent effects determined in other solvents of different polarity.The results accord with a molecular mechanism involving one molecule of bromine and one of the organosilicon hydride, with partial positive charge build-up on silicon in the transition state.