Synthesis and chemical properties of cobalt bis(dicarbollides) [commo-3,3'-
Co(1,2-C2B9H11)(2)](-) and [comma-2,2'-Co(1,7-C2B9H11)(2)](-) and their der
ivatives are reviewed. An attention is also paid to potential applications
of cobalt bis(dicarbollides). A review with 132 references.