ISSN:
1573-9171
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Conclusions 1. Electrophilic bromination of π-cyclopentadienyl-π-(3)-1,2-dicarbollyliron(III) proceeds stepwise on the boron atoms of the π-dicarbollyl ligand with the formation of 8-bromo, 8,9-dibromo, and 8,9,12-tribromo derivatives. 2. Electron density in the π-dicarbollyl ligand of π-dicyclopentadienyl-π-(3)-1,2-dicarbollyliron(III) decreases in the series B(8) 〉 B(9,12) 〉 B(4,5,6,7,10,11). 3. From 4-bromo-(3)-1,2-dicarbaundecaborate, 9-bromo-, and 9,12-dibromo-o-carboranes are obtained, respectively, 4-bromo-, 9-bromo-, and 9,12-dibromo-π-cyclopentadienyl-π-(3)-1,2-dicarbollyliron-(III), and their electrophilic bromination in position 8 has been carried out. 4. The presence of bromine atoms in the π-dicarbollyl ligand does not affect the nature of distribution of electron density, and only slightly decreases it.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00952487
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