Collect. Czech. Chem. Commun. 1997, 62, 1070-1079

Cobaltacarboranes with Intramolecular Monophosphorus Bridges 8,8'-μ-Me2P(1,2-C2B9H10)2-3-Co, 6,6'-μ-Me2P(1,7-C2B9H10)2-2-Co and the Respective Non-Bridged Trimethylphosphine Derivatives (8-Me3P-1,2-C2B9H10)-3-Co-(1,2-C2B9H11) and (6-Me3P-1,7-C2B9H10)-2-Co-(1,7-C2B9H11)

Andreas Frankena, Jaromír Plešeka, Jiří Fuseka and Markus Semraub

a Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, 250 68 Řež near Prague, Czech Republic
b Institut für Anorganische Chemie der Christian-Albrechts-Universitat, Olshausenstr. 40,24098 Kiel, Germany


The first two cobaltacarboranes with intramolecular phoshorus bridges and two related non-bridged trimethylphosphine-cobaltacarborane derivatives are described and characterized by mass spectrometry and multinuclear NMR; all four compounds are zwitterions: 8,8'-μ-Me2P(1,2-C2B9H10)2-3-Co (1a), 6,6'-μ-Me2P(1,7-C2B9H10)2-2-Co (2a), (8-Me3P-1,2-C2B9H10)-3-Co-(1,2-C2B9H11) (1b) and (6-Me3P-1,7-C2B9H10)-2-Co-(1,7-C2B9H11) (2b). X-Ray structures of the first two and of the last compound has been established.

Keywords: Cobaltacarboranes with B-P terminal bonds; B-PMe2-B bridges; X-Ray structures; Multinuclear NMR.