1231208-07-3

Basic information

• Product Name: [2,6-bis(2,6-difluorophenyl)phenyl]dimethylsilylium tetrakis(pentafluorophenyl)borate
• CAS NO: 1231208-07-3
• Molecular Weight: 1038.46
• Mol File: 1231208-07-3.mol

Chemical Properties

• CAS DataBase Reference: [2,6-bis(2,6-difluorophenyl)phenyl]dimethylsilylium tetrakis(pentafluorophenyl)borate(CAS DataBase Reference)
• NIST Chemistry Reference: [2,6-bis(2,6-difluorophenyl)phenyl]dimethylsilylium tetrakis(pentafluorophenyl)borate(1231208-07-3)
• EPA Substance Registry System: [2,6-bis(2,6-difluorophenyl)phenyl]dimethylsilylium tetrakis(pentafluorophenyl)borate(1231208-07-3)

Safety Data

• Hazardous Substances Data: 1231208-07-3(Hazardous Substances Data)

Upstream product

• 1231208-08-4 [2,6-bis(2,6-difluorophenyl)phenyl]dimethylsilane 

Relevant articles and documents

Intramolecular halogen stabilization of silylium ions directs gearing dynamics

2,6-Bis(2,6-difluorophenyl)phenyldimethylsilanium ion (1a) adopts a ground-state C2 trigonal-bipyramidal geometry in which fluorines from opposing 2,6-difluorophenyl groups coordinate to the apical positions of the pentavalent silyl cation. Exchange of fluorine at silicon occurs by a disrotatory gearing mechanism wherein one fluorine remains coordinated to silicon throughout the circuit. The cogwheel transition state is Cs-symmetric, with one ring having a dihedral angle of 0° and the other a dihedral angle of 90°. This correlated dynamic process is a function of the coordinating halogen. The chloro derivative (1b) adopts a similar ground-state geometry, but exchange of chlorine at silicon follows a conrotatory process.