Synthesis of 4-, 5-, and 6-Boron Metallocarboranes from the Polyhedral C2B5H7 System
VIRGINIA UNIV CHARLOTTESVILLE DEPT OF CHEMISTRY
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A series of more than 20 new cobaltIII-small carborane sandwich complexes, of which six are described in this paper, has been prepared from closo-C2B5H7 via reduction with sodium naphthalide in THF, followed by reaction with CoCl2 and NaC5H5 and air oxidation. Separation on silica gel columns and TLC plates has given pi-C2B4H6Copi-C5H5, pi-C2B5H7Copi-C5H5, pi-C2B6H8 Copi-C5H5, pi-C2B4H6Co2pi-C5H52, pi-C2B5H7Co2pi-C5H52 and pi-C2B6H8 Co2pi-C5H52, all of which are air-stable sublimable solids. The characterization is based on boron-11 and proton nmr, infrared, and mass spectra.
- Inorganic Chemistry