13703-88-3

Usage

Uses

Used in Organic Synthesis:
B-TRIBROMOBORAZINE is used as a reagent in organic synthesis for its ability to facilitate various chemical reactions, contributing to the formation of new compounds and materials.
Used in Materials Science:
B-TRIBOROMOBORAZINE is used as a precursor in materials science for the development of polymers with specific properties, such as flame retardants, enhancing the safety and performance of materials in various applications.
Used in Flame Retardants:
B-TRIBROMOBORAZINE is used as a flame retardant in the production of materials that require resistance to fire, such as plastics, textiles, and coatings, improving their safety and durability in various industries.

InChI:InChI=1/B3Br3H3N3/c4-1-7-2(5)9-3(6)8-1/h7-9H

Upstream product

• 13840-97-6 (amino)dibromoborane 
• 10294-33-4 boron tribromide 
• 7443-22-3 2,4,6-triethyl-borazine 
• 7397-53-7 bis(diethylboryl)amine 
• 6569-51-3 borazine 
• 10035-10-6 hydrogen bromide 

Downstream Products

• 10043-11-5 boron nitride 
• 10035-10-6 hydrogen bromide 

Relevant academic research and scientific papers

Vaporization and thermal decomposition of B,B',B''-tribromoborazine

Vapor pressure as a function of temperature above solid and liquid (BrBNH)3 and the thermody-namic parameters of (BrBNH)3 sublimation and vaporization have been determined using static tensimetry with membrane null-manometer. The thermal decomposition of tribromoborazine has been studied in the saturated and unsaturated vapor regions. Irreversible decomposition occurred at noticeable rates at temperatures higher than 343 K and was accompanied by HBr evolution. In the unsaturated vapor region, thermal decomposition has far lower rates than in the saturated vapor region because of diffusion limitations. The activation energy of condensed-phase thermal decomposition of B,B',B''-tribromoborazine is 65 ± 3 kJ/mol, and this value proves that tribromoborazine decomposition at low temperatures is not accompanied by opening of the boron-nitrogen cycle.

Fast H/D exchange of B, B′, B′-tribromoborazine in C 6D6 in the presence of aluminum tribromide: First evidence for an electrophilic substitution reaction of borazines in solution

A solution of B,B′,B′-tribromoborazine (BrBNH)3 in excess C6D6 in a sealed NMR tube shows no changes for over 14 months at room temperature but undergoes fast (within minutes) H/D exchange in the presence of AlBr3 as a Lewis acid, as evidenced by 1H, 2H, 11B, and 27Al NMR spectroscopy. The proposed electrophilic exchange mechanism is in agreement with the results of DFT computations. To our knowledge, this is the first example of the electrophilic substitution reaction of borazines in solution.

Preparation of unsymmetrically B-substituted borazines and characterization of tris(4,6-diethylborazin-2-yl)amine

Symmetrically substituted B,B′,B″-triorganylborazines, (RBNR′)3, react with an equimolar quantity of boron trihalide, BX3 (X = Cl, Br), to form B-monohaloborazines, XR2B2N3R3, as well as RBX2, and with 2 molar equiv of BX3 to form the B,B′-dihaloborazines, X2RB3N3R′3. The compounds are obtained in good yield and purity, and are easily converted to other unsymmetrically B-substituted borazines. The borazines X(CH3)2B3N3(CH3) 3 (X = SCH3, NH2, C4H9, N[Si(CH3)2]), X(C2H5)2B3N3H3 (X = Br, SCH3), Cl(C2H5)2B3N3(CH 3)3, X2(C2H5)2B3N 3H3 (X = Br, SCH3), Cl(C6H5)2B3N3H 3, and Cl2(C2H5)B3N3(CH 3)3 have been prepared and characterized. The compound (H2N)(C2H5)2B3N 3H3 could not be obtained in the pure state; instead, it slowly condenses (even at room temperature) with the formation of the bis(borazin-2-yl)amine HN[(C2H5)2B3N3H 3]2 and the tris(borazin-2-yl)amine N[(C2H5)2B3N3H 3]3. The borazine (H2N)(CH3)2B3N3(CH 3)3 condenses at temperatures from 250 to 270°C to give HN [(CH3)2B3N3(CH3) 3]2. Reaction of this bis(borazin-2-yl)amine with LiC4H9 yields (C4H9)(CH3)2B3N 3(CH3)3 and (NHLi)(CH3)2B3N3(CH 3)3; the latter then reacts with Cl(CH3)2B3N3(CH3) 3 to regenerate HN[(CH3)2B3N3(CH3) 3]2. The unsymmetricaliy N-substituted borazine (C2H5)3B3N3H 2[Si(CH3)3] has been isolated and characterized.