952208-17-2

Basic information

• Product Name: [(CH(CH₃)2)3P(C₆F₄)BH(C₆F₅)2]
• Synonyms: [(CH(CH₃)2)3P(C₆F₄)BH(C₆F₅)2]
• CAS NO: 952208-17-2
• Molecular Weight: 654.234
• Mol File: 952208-17-2.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: [(CH(CH₃)2)3P(C₆F₄)BH(C₆F₅)2](CAS DataBase Reference)
• NIST Chemistry Reference: [(CH(CH₃)2)3P(C₆F₄)BH(C₆F₅)2](952208-17-2)
• EPA Substance Registry System: [(CH(CH₃)2)3P(C₆F₄)BH(C₆F₅)2](952208-17-2)

Safety Data

• Hazardous Substances Data: 952208-17-2(Hazardous Substances Data)

Upstream product

• 1066-35-9 dimethylmonochlorosilane 
• 6476-36-4 tris(1-methylethyl)phosphine 
• 1109-15-5 tris(pentafluorophenyl)borate 

Relevant articles and documents

Tuning Lewis acidity using the reactivity of "frustrated Lewis pairs": Facile formation of phosphine-boranes and cationic phosphonium-boranes

The concept of "frustrated Lewis pairs" involves donor and acceptor sites in which steric congestion precludes Lewis acid-base adduct formation. In the case of sterically demanding phosphines and boranes, this lack of self-quenching prompts nucleophilic attack at a carbon para to B followed by fluoride transfer affording zwitterionic phosphonium borates [R 3P(C6F4)BF(C6F5) 2] and [R2PH(C6F4)BF(C 6F5)2]. These can be easily transformed into the cationic phosphonium-boranes [R3P(C6F 4)B(C6F5)2]+ and [R 2PH(C6F4)B(C6F5) 2]+ or into the neutral phosphino-boranes R 2P(C6F4)B(C6F5) 2. This new reactivity provides a modular route to a family of boranes in which the steric features about the Lewis acidic center remains constant and yet the variation in substitution provides a facile avenue for the tuning of the Lewis acidity. Employing the Gutmann-Beckett and Childs methods for determining Lewis acid strength, it is demonstrated that the cationic boranes are much more Lewis acidic than B(C6F5) 3, while the acidity of the phosphine-boranes is diminished. The Royal Society of Chemistry 2007.