title: Syntheses and crystal structures of the closo-borate M[B8H9] (M = [PPh4]+ and [N(n-Bu4)]+).
abstract: Protonation of M(2)[B(8)H(8)] with HCl or NEt(3)·HCl resulted in M[B(8)H(9)] (M = [PPh(4)](+) or [N(n-Bu(4))](+)). The monoanion was isolated and characterized by (1)H, (1)H{(11)B}, (11)B, and (11)B{(1)H} NMR spectroscopy. The "protonated" form [B(8)H(9)](-) showed a dynamic behavior in solution, which was analyzed by NMR spectroscopy and compared with theoretical calculations. The structures of [B(8)H(9)](-) as well as [B(8)H(8)](2-) were determined by single-crystal X-ray diffraction.
authors.affiliation: Fachbereich C-Anorganische Chemie, Bergische Universität Wuppertal, Gaußstraße 20, 42119 Wuppertal, Germany.
authors.forename: Florian
authors.initials: F
authors.lastname: Schlüter
authors.forename: Eduard
authors.initials: E
authors.lastname: Bernhardt