title: Forging Unsupported Metal-Boryl Bonds with Icosahedral Carboranes.
abstract: In contrast to the plethora of metal-catalyzed cross-coupling methods available for the installation of functional groups on aromatic hydrocarbons, a comparable variety of methods are currently not available for icosahedral carboranes, which are boron-rich three-dimensional aromatic analogues of aryl groups. Part of this is due to the limited understanding of the elementary steps for cross-coupling involving carboranes. Here, we report our efforts in isolating metal-boryl complexes to further our understanding of one of these elementary steps, oxidative addition. Structurally characterized examples of group 10 M-B bonds featuring icosahedral carboranes are completely unknown. Use of mercurocarboranes as a reagent to deliver M-B bonds saw divergent reactivity for platinum and palladium, with a Pt-B bond being isolated for the former, and a rare Pd-Hg bond being formed for the latter.
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Los Angeles (UCLA), 607 Charles E. Young Drive East, Los Angeles, CA, 90095, USA.
authors.forename: Liban M A
authors.initials: LM
authors.lastname: Saleh
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Los Angeles (UCLA), 607 Charles E. Young Drive East, Los Angeles, CA, 90095, USA.
authors.forename: Rafal M
authors.initials: RM
authors.lastname: Dziedzic
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Los Angeles (UCLA), 607 Charles E. Young Drive East, Los Angeles, CA, 90095, USA.
authors.forename: Saeed I
authors.initials: SI
authors.lastname: Khan
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Los Angeles (UCLA), 607 Charles E. Young Drive East, Los Angeles, CA, 90095, USA. spokoyny@chem.ucla.edu.
authors.forename: Alexander M
authors.identifier: 0000-0002-5683-6240
authors.initials: AM
authors.lastname: Spokoyny
keywords: boron; carboranes; cross-coupling; palladium; platinum