Versatile Chemistry of Phosphorus-Substituted Carboranes
Professor Evamarie Hey-Hawkins - Chair in Inorganic Chemistry, Leipzig University, Germany
Host: Alexandra Velian

Carboranyl derivatives with phosphorus-based substituents (phosphines, phosphites, 
phosphonates, etc.) can be employed as (chiral) ligands in catalysis or in medical areas. This 
presentation will focus on the synthesis and reactivity of secondary and (very) bulky tertiary 
carboranyl phosphines.[1] Furthermore, the carboranyl backbone allows the targeted synthesis of 
four- and five-membered phosphorus-containing heterocycles having endocyclic P–P bonds, 
which are difficult to obtain via other routes. In addition, 1,2-bisphosphanyl-substituted 
ortho-carboranes, the precursors for 1,2-diphosphetanes, 1,2,3-triphospholanes, 1,2,3-
triphospholanides, and other carboranyl-substituted heterocycles will be discussed. The influence of the carboranyl backbone in redox reactions, ring-opening reactions, coordination chemistry, and catalysis will also be covered.

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