title: Acid-induced opening of [closo-B10H10]2- as a new route to 6-substituted nido-B10H13 decaboranes and related carboranes.
abstract: Protonation of the polyhedral anion [closo-B(10)H(10)](2-) under superacidic conditions apparently generates an electrophilic intermediate, [B(10)H(13)](+), that forms 6-R-nido-B(10)H(13) (R = aryl, alkyl, triflate) derivatives by electrophilic aromatic substitution, C-H bond activation, or ion-pair collapse, respectively. The proposed mechanism of formation of the 6-R-nido-B(10)H(13) derivatives via the boranocation [B(10)H(13)](+) is discussed. The synthesis of carboranes, starting from 6-R-nido-B(10)H(13) decaboranes, and single-crystal X-ray diffraction analyses of several 6-R-nido-B(10)H(13) decaboranes and carboranes are described.
authors.affiliation: International Institute of Nano & Molecular Medicine, School of Medicine, University of Missouri, 1514 Research Park Drive, Columbia, Missouri 65211, USA.
authors.forename: Oleg
authors.initials: O
authors.lastname: Bondarev
authors.forename: Yulia V
authors.initials: YV
authors.lastname: Sevryugina
authors.forename: Satish S
authors.initials: SS
authors.lastname: Jalisatgi
authors.forename: M Frederick
authors.initials: MF
authors.lastname: Hawthorne
mesh_terms: D000143:Acids / Q000737:chemistry*; D001880:Boranes / Q000737:chemistry*; D001896:Boron Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure; D011789:Quantum Theory
chemical_list: D000143:Acids; D001880:Boranes; D001896:Boron Compounds