4151-78-4

Basic information

• Product Name: Borane, dibromo(4-methylphenyl)-
• CAS NO: 4151-78-4
• Molecular Formula: C7H7BBr2
• Molecular Weight: 261.752
• Mol File: 4151-78-4.mol
• Article Data: 5

Chemical Properties

• CAS DataBase Reference: Borane, dibromo(4-methylphenyl)-(CAS DataBase Reference)
• NIST Chemistry Reference: Borane, dibromo(4-methylphenyl)-(4151-78-4)
• EPA Substance Registry System: Borane, dibromo(4-methylphenyl)-(4151-78-4)

Safety Data

• Hazardous Substances Data: 4151-78-4(Hazardous Substances Data)

Upstream product

• 37773-23-2 p-Selenocresol 
• 10294-33-4 boron tribromide 
• 27545-47-7 4-CH₃C₆H₄BI₂ 
• 108-88-3 toluene 
• 15738-23-5 sodium tetrakis(4-tolyl)borate 
• 13351-51-4 p-tolylquecksilber(II) bromide 
• 3728-43-6 p-(trimethylsilyl)toluene 
• 106-38-7 para-bromotoluene 
• 19287-45-7 diborane 
• 537-64-4 bis(p-tolyl)mercury 

Downstream Products

• 5720-05-8 4-methylphenylboronic acid 
• 5084-80-0 tri(4-tolyl)boroxine 
• 156629-36-6 2,4,6-tris(4-methylphenyl)-cyclo-1,3,5-trithia-2,4,6-triborinane 
• 29137-41-5 3,5-bis(4-methylphenyl)-cyclo-1,2,4-trithia-3,5-diborolane 
• 875814-36-1 4-(bromo(ethoxy)boryl)toluene 

Relevant articles and documents

Oxygen-Oxygen Bond Cleavage and Formation in Co(II)-Mediated Stoichiometric O2 Reduction via the Potential Intermediacy of a Co(IV) Oxyl Radical

In reactions of significance to alternative energy schemes, metal catalysts are needed to overcome kinetically and thermodynamically difficult processes. Often, high-oxidation-state, high-energy metal oxo intermediates are proposed as mediators in elementary steps involving O-O bond cleavage and formation, but the mechanisms of these steps are difficult to study because of the fleeting nature of these species. Here we utilized a novel dianionic pentadentate ligand system that enabled a detailed mechanistic investigation of the protonation of a cobalt(III)-cobalt(III) peroxo dimer, a known intermediate in oxygen reduction catalysis to hydrogen peroxide. It was shown that double protonation occurs rapidly and leads to a low-energy O-O bond cleavage step that generates a Co(III) aquo complex and a highly reactive Co(IV) oxyl cation. The latter was probed computationally and experimentally implicated through chemical interception and isotope labeling experiments. In the absence of competing chemical reagents, it dimerizes and eliminates dioxygen in a step highly relevant to O-O bond formation in the oxygen evolution step in water oxidation. Thus, the study demonstrates both facile O-O bond cleavage and formation in the stoichiometric reduction of O2 to H2O with 2 equiv of Co(II) and suggests a new pathway for selective reduction of O2 to water via Co(III)-O-O-Co(III) peroxo intermediates.

Synthesis and characterization of triarylborthiins, Ar3B3S3 (Ar=4-MeC6H4, 3-MeC6H4, 2-MeC6H4, 4-EtC6H4, and 3,5-Me2C6H3)

The air/moisture-sensitive triarylborthiins, Ar3B3S3 (Ar=4-MeC6H4, 3-MeC6H4, 2-MeC6H4, 4-EtC6H4, and 3,5-Me2C6H3), have been prepared by the reaction of ArBBr2 with HgS in benzene at reflux and have been characterized by 11B NMR and IR spectroscopy and ma

A New Borylation Method for Alkylbenzene and Polystyrene

The borylation of alkylbenzenes by Hal2BH (Hal = F, Cl, Br) gives H2 and a mixture of m- and p-alkyl(dihaloboryl)benzenes.In the case of bulky alkyl groups, such as isopropyl, tert-butyl, these are partially split off as R - H and RBHal2.The phenyl groups in polystyrene-divinylbenzene copolymers undergo borylation with Br2BH in a 55percent yield.