Reaction of nido-7,8-C2B9H13 with pentacarbonyl(methyl)manganese: Crystal structure of the charge-compensated complex [Mn(CO)3{η5-7,8-C2B9H10-10-O(CH2)4}]

Zwitterionic Organometallates

“…Therefore, although the complex is indeed zwitterionic, it should not be regarded as a formal metallate species. [73] …”

Frustrated Lewis Pairs: Metal‐free Hydrogen Activation and More

“…[90] Related combinations of Lewis acids and Lewis bases exhibit similar THF ring-opening chemistry. These include systems involving Lewis acidic transition metals, such as U, [91] Sm, [92] Ti, [93] and Zr [90,94] and main-group Lewis acids including carborane, [95] alane, [96] tellurium species, [97] and boranes [98] in combination with either nitrogen-or phosphorus-based Lewis bases (Scheme 53). The most pertinent of these to the present discussion is the zwitterionic species R 2 PH(CH 2 ) 4 OB(C 6 F 5 ) 3 (R = tBu, C 6 H 2 Me 3 ) derived from the treatment of (THF)B-(C 6 F 5 ) 3 with sterically encumbered phosphines.…”

Frustrierte Lewis‐Paare: metallfreie Wasserstoffaktivierung und mehr

“…Dies wurde unter anderem mit Lewis-aciden d-und f-Metallen wie U, [91] Sm, [92] Ti, [93] und Zr [90,94] gezeigt, aber auch mit Lewis-Säuren von Hauptgruppenelementen, z. B. Carboran, [95] Alan, [96] Te-Verbindungen [97] und Boranen [98] in Kombination mit Stickstoff-oder Phosphor-Lewis-Basen (Schema 53). Für die hier geführte Diskussion ist vermutlich das Zwitterion R 2 PH(CH 2 ) 4 OB(C 6 F 5 ) 3 (R = tBu, C 6 H 2 Me 3 ), erhalten durch Umsetzung von (THF)B(C 6 F 5 ) 3 mit sterisch gehinderten Phosphinen, von besonderer Bedeutung.…”