1073-39-8

Basic information

• Product Name: 4-Bromobenzocyclobutene
• Synonyms: 3-BROMO-BICYCLO[4.2.0]OCTA-1,3,5-TRIENE;4-Bromobenzocyclobutene;4-bromocyclobutabenzene;1-broMo-4-(cyclobut-1-en-1-yl)benzene;4-broMobicyclo[4.2.0]octa-1(6),2,4-triene;4-BrBCB 4-Bromobenzocyclobutene;4-Bromo-1,2-dihydrobenzocyclobutene;4-BROMO-BENZOCYCLOBUTANE
• CAS NO: 1073-39-8
• Molecular Formula: C₈H₇Br
• Molecular Weight: 183.05
• Product Categories: Aluminium foil bag/Fluoride bottle or on your request
• Mol File: 1073-39-8.mol
• Article Data: 8

Chemical Properties

• Boiling Point: 221.4 °C at 760 mmHg
• Flash Point: 100℃
• Appearance: /
• Density: 1.470 g/mL at 25 °C
• Vapor Pressure: 0.159mmHg at 25°C
• Refractive Index: n20/D1.589
• Storage Temp.: 2-8°C
• CAS DataBase Reference: 4-Bromobenzocyclobutene(CAS DataBase Reference)
• NIST Chemistry Reference: 4-Bromobenzocyclobutene(1073-39-8)
• EPA Substance Registry System: 4-Bromobenzocyclobutene(1073-39-8)

Safety Data

• Hazard Codes: Xn
• Statements: 22-51
• WGK Germany: 3
• Hazardous Substances Data: 1073-39-8(Hazardous Substances Data)

Usage

Chemical Properties

colorless or light yellow liquid

InChI:InChI=1/C8H7Br/c9-8-4-3-6-1-2-7(6)5-8/h3-5H,1-2H2

Upstream product

• 694-87-1 benzocyclobutene 
• 552-45-4 1-chloromethyl-2-methylbenzene 
• 4235-46-5 4,α,α,α',α'-pentabromo-o-xylene 
• 4181-31-1 4-Brom-1,2-dijod-benzocyclobuten 

Downstream Products

• 55716-66-0 bicyclo[4.2.0]octa-1,3,5-trien-4-amine 
• 60582-10-7 2,4,5,6-tetrahydro-1H-cyclobuta[f]indene 
• 114842-00-1 1,2,5,6-tetrahydro-4H-cyclobuta[f]inden-4-one 

Relevant articles and documents

Novel cross-linking monomer based on benzocyclobutene for an application in microelectronics

A new cross-linking monomer, allyl-bis(benzocyclobuten-4-yl)methylsilane (ABCBMS), was synthesized and its physical properties were investigated. Copolymers of ABCBMS with triethylene glycol dimethacrylate (TGM-3) and bis(methacryloylethylene glycol) carbonate (BMCC-2) were obtained by photo- and thermal polymerization. The final cross-linking of the copolymers took place at 200 °C. Homo- and copolymers of ABCBMS, ABCBMS-TGM-3 (50: 50) and ABCBMS—BMCC-2 (50: 50) exhibit high thermal stability (Td5% = 460, 359, and 352 °C, respectively) and good dielectric properties (ε = 2.7–2.8 and tg δ = (3.7–6.7)?10?4 at 10 GHz).

Rodlike Tetracene Derivatives

Efficient and versatile synthetic access to rodlike tetracene derivatives was developed by means of Diels–Alder cycloaddition, halogenation, halogen–metal exchange, and transition metal mediated coupling reactions. Herein, the synthesis and structural, electrical, and charge-transport properties of three of the resulting materials, namely, 2-(tetracen-2-yl)tetracene, 1,4-bis(2-tetracenyl)benzene, and 2,5-bis(2-tetracenyl)thiophene, are presented. Good crystallization behavior on SiO2 substrates, narrowing of the bandgap by 0.2 eV, and a decrease of the ionization potential of more than 0.5 eV compared to tetracene were observed. Charge-carrier field-effect mobilities on the order of 10?1 cm2 V?1 s?1, on/off ratios of 105, and threshold voltages Vth15 V were found in thin-film organic field-effect transistors prepared by standard high-vacuum deposition techniques.

ARYL, HETEROARYL, AND HETEROCYCLIC COMPOUNDS FOR TREATMENT OF IMMUNE AND INFLAMMATORY DISORDERS

Compounds, methods of use, and processes for making inhibitors of complement Factor D are provided comprising Formula I, I" and I'" or a pharmaceutically acceptable salt or composition thereof. The inhibitors described herein target Factor D and inhibit or regulate the complement cascade. The inhibitors of Factor D described herein reduces the excessive activation of complement.