Redox activation of a B–H bond: a new route to metallaboratrane complexes

Abstract

Oxidative activation of a B-H bond of a coordinated scorpionate ligand provides an unprecedented route to rhodaboratranes.

Crystal field arguments to explain the trans labilisation within transition metal–borane complexes

“…This has been shown in a large number of examples that have been reported over the past few years. The majority of compounds, which have been provided by Hill [2][3][4][5][6][7][8][9][10][11][12] and others [13][14][15][16][17][18][19][20][21], contain either the flexible scorpionate ligand, Tm [hydrotris(2-methyl-1-imidazolyl)borate] or similar derivatives (Fig. 2).…”

Synthetic reactions and coordination modes of ruthenium complexes with tris(mercaptomethimazolyl)borate ligands

“…, and Connelly[33].Among the ruthenium examples to date were complexes containing the mixed sandwich [(g 6 -p-cymene)Ru II (Tm R )]Cl and [Cp*Ru II (Tm R )] (R = Me, Et) with a j 3 -S,S,S-Ru coordination mode [12,34], ruthenab--S,S,S,B ? Ru coordination mode…”

Coordination Chemistry of Neutral (Ln)–Z Amphoteric and Ambiphilic Ligands

“…[58] It was also possible to synthesize complex [{κ 4 -B(taz) 3 }Rh(CO)(PPh 3 )] (63), where taz (Figure 2) stands for thioxotriazolyl, from the two-electron oxidation of [{HB(taz) 3 }Rh(PPh 3 )(CO)] by using [Cp 2 Fe](PF 6 ) as oxidant. [63] Such a reaction suggests that the borane dative bond would rather act as a dianion (BR 3 2-) once coordinated to a transition metal, a feature that has been argued in the characterization of the MǞB interaction (to be discussed in a further section).…”