220503-31-1

Basic information

• Product Name: Boranthrene, 1,2,3,4,6,7,8,9-octafluoro-5,10-dihydro-5,10-bis(pentafluorophenyl)-
• CAS NO: 220503-31-1
• Molecular Formula: C24B2F18
• Molecular Weight: 651.857
• Mol File: 220503-31-1.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: Boranthrene, 1,2,3,4,6,7,8,9-octafluoro-5,10-dihydro-5,10-bis(pentafluorophenyl)-(CAS DataBase Reference)
• NIST Chemistry Reference: Boranthrene, 1,2,3,4,6,7,8,9-octafluoro-5,10-dihydro-5,10-bis(pentafluorophenyl)-(220503-31-1)
• EPA Substance Registry System: Boranthrene, 1,2,3,4,6,7,8,9-octafluoro-5,10-dihydro-5,10-bis(pentafluorophenyl)-(220503-31-1)

Safety Data

• Hazardous Substances Data: 220503-31-1(Hazardous Substances Data)

Upstream product

• 1109-15-5 tris(pentafluorophenyl)borate 
• 801-79-6 dimethylbis(pentafluorophenyl)tin 
• 14275-62-8 1,2-bis(trimethylstannyl)benzene 
• 23653-79-4 1,2-bis(trimethylstannyl)-3,4,5,6-tetrafluorobenzene 

Downstream Products

• 473712-76-4 C₆F₄B₂(C₆F₅)2C₆F₄CH₃CN 
• 1109-15-5 tris(pentafluorophenyl)borate 

Relevant articles and documents

New perfluoroarylborane activators for single-site olefin polymerization. Acidity and cocatalytic properties of a "superacidic" perfluorodiboraanthracene

The synthesis, Lewis acid properties, and single-site olefin polymerization characteristics of catalyst systems utilizing the binuclear organo-Lewis acid cocatalyst 9, 10-bis(pentafluorophenyl)-9, 10-diboraoctafluoroanthracene, C12F8B2(C6F5)2 (8b), are reported. X-ray diffraction analysis of 8b reveals a nearly planar C12F8B2 core with -C6F5 rings rotated 75° out of the plane, hindering π communication between the pendant -C6F5 substituents and the C12F8B2 core, and thereby enhancing Lewis acidity at the boron centers. Competition equilibration experiments with 8b, B(C6F5)3, and acetonitrile over a wide temperature range demonstrate that 8b is a stronger Lewis acid than B(C6F5)3 by ΔH = +1.4(2) kcal/mol and ΔS = -5.3(1) eu. The diffraction-derived molecular structure of 8b←NCCH3 reveals substantial skeletal reorganization only at the coordinated boron center. When it is paired with dimethyl organo-group 4 catalyst precursors, 8b affords extremely efficient single-site olefin polymerization systems in both laboratory and large-scale reactors. In all cases, 8b forms polymerization systems with higher activities than those utilizing B(C6F5)3 as the cocatalyst.