70083-57-7

Basic information

• Product Name: Li[MeB(C₆F₅)3]
• Synonyms: Li[MeB(C₆F₅)3]
• CAS NO: 70083-57-7
• Molecular Weight: 533.961
• Mol File: 70083-57-7.mol
• Article Data: 5

Chemical Properties

• CAS DataBase Reference: Li[MeB(C₆F₅)3](CAS DataBase Reference)
• NIST Chemistry Reference: Li[MeB(C₆F₅)3](70083-57-7)
• EPA Substance Registry System: Li[MeB(C₆F₅)3](70083-57-7)

Safety Data

• Hazardous Substances Data: 70083-57-7(Hazardous Substances Data)

Upstream product

• 1109-15-5 tris(pentafluorophenyl)borate 
• 917-54-4 methyllithium 
• 4039-32-1 lithium hexamethyldisilazane 
• 594-19-4 tert.-butyl lithium 
• 4111-54-0 lithium diisopropyl amide 

Downstream Products

• 1305352-94-6 [2,6-Me₂C₅H₃NH+] [H₃CB(C₆F₅)3-] 

Relevant articles and documents

Metal-free carbon dioxide reduction and acidic C-H activations using a frustrated Lewis pair

Activation of CO2 and acidic C-H bonds by the lutidine-tris(pentafluorophenyl)borane [Lut/B(C6F5) 3] frustrated Lewis pair (FLP) are described (lutidine = 2,6-dimethylpyridine). Lut/B(C6F5)

Anion exchange in alkyl-zirconocene borate ion pairs. Are solvated alkyl-zirconocene cations relevant intermediates?

Ion pairs of the type Cpx2ZrMe+···A - containing various ansa-zirconocene methyl cations in contact with Me-B(C6F5)3- or B(C6F5)4- anions have been studied with regard to their anion exchange kinetics by 2D-NMR methods in benzene or toluene solutions. The results - acceleration of anion exchange by added Li+···Me-B(C6F5) 3-, substantial nonproductive exchange between added and Zr-bound Me-B(C6F5)3- anions, an increase of exchange rates at increased zirconocene concentrations, and the exclusively entropic origin of this rate increase - all indicate that anion exchange occurs by way of ion quadruples or higher ionic aggregates, rather than via dissociation to solvent-separated ions. These findings imply that solvent-separated (i.e. anion-free) alkyl zirconocene cations are unlikely to be relevant intermediates in reaction systems containing Cpx2ZrMe+···A - ion pairs and, hence, also in zirconocene-based catalyst systems for the polymerization of α-olefins.

C-H activation at Pt(II) to form stable Pt(IV) alkyl hydrides

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