Transition metal mediated homologation of BH3·THF: synthesis and crystal structure of [WH3(PMe3)3B3H8]

Reactions of pentaborane(9) with electron-rich molybdenum and tungsten phosphine polyhydrides

“…There are several bond lengths of note in the structure of (2 lengths are comparable to those in other tungstenaboranes [9,10,12]. The 11 B NMR spectrum of (2) consists of five resonances of relative intensity 1:1:1:1:1.…”

“…Crystallographic calculations were carried out using the Oxford ''CRYS-TALS'' package [24]. (9) A solution of pentaborane (9) in toluene (0.41 M, 15 ml) was added to a solution of [Mo(PMe 2 Ph) 4 H 4 ] (2 g, 3.1 mmol) in light petroleum (20 ml) and the solution stirred at ambient temperature for 56 h. The reaction mixture was chromatographed on silica gel eluting with light petroleum:diethyl ether 20:1. An orange band was eluted and collected.…”

“…We have also reported the reaction of the tungsten complex [W(PMe 3 ) 3 H 6 ] with metallaboranes to give novel metallaborane clusters [7,8]. We decided to extend the study to the reaction of pentaborane (9) with electron-rich phosphine polyhydrides of tungsten and molybdenum. Only two previous studies of the reaction of Group 6 electron-rich phosphine polyhydrides with boron hydrides have been reported.…”

“…We are exploring the reaction of pentaborane (9) with electron-rich transition-metal compounds. For example, the reaction of pentaborane (9) with [Fe(PMe 3 [6].…”

“…We are exploring the reaction of pentaborane (9) with electron-rich transition-metal compounds. For example, the reaction of pentaborane (9) with [Fe(PMe 3 [6]. We have also reported the reaction of the tungsten complex [W(PMe 3 ) 3 H 6 ] with metallaboranes to give novel metallaborane clusters [7,8].…”