Perfluoroaryl boryl complexes: synthesis, spectroscopic and structural characterisation of a complex containing the bis(pentafluorophenyl)boryl ligand

Abstract

The synthesis, spectroscopic and structural characterisation of the bis(pentafluorophenyl)boryl derivative CpFe-(CO)2B(C6F5)2 are reported.

The first silyl- and germylboryl complexes: synthesis from novel (dichloro)silyl- and (dichloro)germylboranes, structure and reactivity

“…The multinuclear NMR data of 5-8 in solution meet the expectations, showing for example considerably deshielded 11 B NMR resonances with respect to those of the aminoborane precursors at δ = 79.2 (5), 80.0 (6), 79.7 (7) and at δ = 55.5 (8). The smaller boranes 5, 6, and 8 display single sets of signals for the ER 3 -ligand in the 1 H and 13 C NMR spectra, thus proving free rotation with respect to the B-E bond in solution.…”

“…Boryl complexes L x M-BR 2 (R = alkyl, aryl) without ligand-to-boron πinteraction are very rare, but have received significant interest in studies, which addressed the nature of the metal-boron linkage and the role of metal-boron π-interaction in particular. 1,7 Due to the obvious difficulties accompanying the synthesis of alkyl-and arylboryl complexes, corresponding silyl-or germylboranes could provide a useful alternative.…”

Recent chemistry of the η5-cyclopentadienyl dicarbonyl iron anion

“…In an effort to develop synthetic routes to metal complexes containing the B(C 6 F 5 ) 2 ligand, Aldridge and coworkers synthesized [207] FpB(C 6 F 5 ) 2 (Scheme 143). Complexes containing C 6 H 5 -like moieties show potential as highly acidic Lewis acids at the boron centers and thus may serve as useful probes for possible boryl ligands to act as -acids.…”

Boron-Based Lewis Acid Transition Metal Complexes as Potential Bifunctional Catalysts

“…In 1990, an early beautiful example of type D LA-TM complex was reported by Baker et al [43] (46 in Figure 23), in which a typical TM＝B double bond was formed by donating the electron pair of iridium to boron's empty p z orbital. Later, Hartwig [44] and Aldridge et al [45] reported the synthesis and structure of type D biarylboryl complexes CpFe(CO) 2 B(Ar) 2 (47) (Figure 23). A rare example of type D dialkylboryl tungsten complex 48 with -H agostic interaction was reported by Pritzkow et al [46] As for type E sp 2 boron-based LA-TM complexes, only very few examples have been found until now.…”