Hydroboration reactions using transition metal borane and borate complexes: an overview

Abstract

In recent years, the chemistry of transition metal borane and borate complexes has advanced expressively with reasonable growth. Frequent utilisation of these complexes in hydrofunctionalization reactions is one of the...

Synthesis and Chemistry of Dihydridoborate Group 7 Metal Complexes with Varied N,E-Chelated Ligands (E = O, NH, or S)

“…As shown in Figure , the solid-state X-ray structure of 8 shows monohydroborated bis­(σ)­borated species, formed via Markovnikov addition. Also, it is plausible to assume that the formation of 8 is through trans -hydroboration of alkynes, similar to that reported by Miyaura and us. ,, The Mn–B distance of 2.152(8) Å is comparable to that of its precursor 5 (2.148(3) Å) and other Mn-dihydridoborated species. ,, The olefinic moiety in 8 resides away from the {MnBH 2 } plane. The olefinic C23–C24 bond length of 1.317(8) Å is comparatively shorter as compared to the typical CC bond distance.…”

Applications of catalysis in hydroboration of imines, nitriles, and carbodiimides

“…7 To date, catalysts ranging from main group elements [8][9][10][11][12][13] and transition metals [14][15][16][17][18][19][20] have been extensively developed for the hydroboration of unsaturated organic molecules. [21][22][23][24][25][26] These continue to be of interest in chemical syntheses of complex molecules as well as the production of commodity and agrochemicals. Amongst unsaturated species, nitrogen containing compounds such as imines, nitriles, carbodiimides etc.…”

Transition Metal Borate Complexes Containing κ0‐κ6 Denticity of Scorpionate Borate Ligands

“…Therefore, the TM σborane/borate complexes are very interesting from the aspect of their coordination, geometry as well as applications in catalysis. [29][30] The most common hydroborate anion, [BH 4 ] À is an efficient polyhapto ligand in the coordination chemistry. [31][32][33][34][35] The TMtetrahydroborate complexes show that the ligation of [BH 4 ] À is invariably through bridging hydrogen atoms.…”

“…The Lewis base stabilized σ ‐boranes and σ ‐borate complexes contain high energy B−H σ *‐orbitals, which offer negligible backdonation from the metal center. Therefore, the TM σ ‐borane/borate complexes are very interesting from the aspect of their coordination, geometry as well as applications in catalysis [29–30] …”