17933-16-3

Basic information

• Product Name: CH3BBr2
• Synonyms: CH3BBr2;Methyldibromoborane;Methylboron dibromide
• CAS NO: 17933-16-3
• Molecular Formula: CH₃BBr₂
• Molecular Weight: 185.6535
• Mol File: 17933-16-3.mol
• Article Data: 1

Chemical Properties

• Boiling Point: -127.7°C (estimate)
• Flash Point: 7.6 °C
• Appearance: /
• Density: 1.988 g/cm³
• Vapor Pressure: 67.6mmHg at 25°C
• Refractive Index: 1.46
• CAS DataBase Reference: CH3BBr2(CAS DataBase Reference)
• NIST Chemistry Reference: CH3BBr2(17933-16-3)
• EPA Substance Registry System: CH3BBr2(17933-16-3)

Safety Data

• Hazardous Substances Data: 17933-16-3(Hazardous Substances Data)

Usage

General Description

Cesium dibromomethylborate (CH3BBr2) is a chemical compound with the formula CH3BBr2. It is a colorless, water-insoluble solid that is used as a source of methylborane in organic synthesis. CH3BBr2 is primarily utilized in the preparation of organic boron compounds and as a reactant in cross-coupling reactions, such as the Suzuki-Miyaura coupling. It is a particularly useful reagent due to its stability and ease of handling, making it a valuable precursor in the synthesis of complex organic molecules. Additionally, CH3BBr2 has also been explored for its potential application as a reagent in the development of new drug compounds and materials.

InChI:InChI=1/CH3BBr2/c1-2(3)4/h1H3

Upstream product

• 762-73-2 trimethyl(allyl)stannane 
• 10294-33-4 boron tribromide 
• 39916-34-2 (CO)5Cr(P(C₆H₅)2Sn(CH₃)3) 
• 39916-39-7 W(CO)5(P(C₆H₅)2(Sn(CH₃)3)) 
• 39916-37-5 (CO)5Mo(P(C₆H₅)2Sn(CH₃)3) 
• 57877-88-0 3,4,5-trimethyl-1,2,4,3,5-dithiazadiborolidine 

Downstream Products

• 13061-96-6 dihydroxy-methyl-borane 
• 25928-45-4 Fluoressigsaeure-bromid-, Dimeres 
• 21188-80-7 1-butyl-2-methyl-3-phenyl-1,2,3,5,6,10b-hexahydro-[1,2,4,3]triazaborolo[5,1-a]isoquinoline 
• 6063-64-5 1,3-diethyl-2-methyl-1,3,2-diazaboracyclopentane 
• 7550-35-8 lithium bromide 
• 29173-12-4 1,2,3-trimethyl-[1,3,2]diazaborolidine 
• 51901-80-5 CH₃B(SC₆H₅)2 
• 52032-67-4 1,3-diphenyl-2,4,5-trimethyl-1,3,2-diazaborol-4-ene 
• 10035-10-6 hydrogen bromide 
• 51901-56-5 2-Methyl-1,2-dihydro-benzo[d][1,3,2]oxazaborinin-4-one 
• 51901-62-3 2-Methyl-benzo[1,3,2]dioxaborinin-4-one 
• 2857-97-8 trimethylsilyl bromide 
• 877-07-6 hexamethylborazine 
• 1739-28-2 (4-C₂H₅-C₆H₄)2NBBr(CH₃) 

Relevant articles and documents

Contributions to the Chemistry of Boron, 128. Investigations on Substituent Exchange Reactions using 10B Labelling: Reactions of 1,3,2-Dithiaborolanes and Related Heterocycles with Boron Tribromide

The formation of the bromo derivatives from methylated dithiaza- (3) and thiadiazadiborolidines (6) and BBr3 follows the endocyclic reaction mechanism.This holds also for the substituent exchange between some 2-bromo- (9) and 2-(dialkylamino)-1,3,2-dithiaborolanes (15, 18) as demonstrated by the use of 10BBr3.An addition of BBr3 to one of the ring sulfur atoms preceeds the substitution process.Some of these adducts were isolated and the equilibrium constants of te adduct formation were determined. 3,5-Bis(diisopropylamino)-1,2,4,3,5-trithiadiborolane (22) forms alsoan S-adduct with 10BBr3 (23).The substituent exchange proceeds endocyclically while the same reaction involving the 3,5-bis(dimethylamino) derivative follows the exocyclic route.