VIRGINIA UNIV CHARLOTTESVILLE DEPT OF CHEMISTRY
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The novel compounds eta-C5H53C03B3H5 I, eta-C5H53C053B4H4 II, and eta-C5h54C04B4H4 III have been isolated as air-stable crystalline solids from the reaction of NaB5H8- with CoCl1 and NaC5H5 below 20 degrees, and characterized from mass spectra and NMR spectra. The proposed structures of I, II, and III are respectively octahedral, capped octahedral, and dodecahedral. Compounds I and III are the first metalloboron species to have as many metal as boron atoms in the cage, III is the first tetrametallic metalloborane, and II is the only polyhedral boron cage molecule having a boron isolated from other boron atoms. The three compounds are closely related electronically and structurally to both the metal clusters and the boranes, and may be regarded as hybrids of the two classes.
- Organic Chemistry
- Atomic and Molecular Physics and Spectroscopy