16557-29-2

Upstream product

• 41593-58-2 diphenylphosphineborane 
• 1134642-34-4 C₂H₂N₂(2,6-dimethylbenzene)PPPh₂BH₃ 
• 829-85-6 diphenylphosphane 

Downstream Products

• 1983-57-9 {(C₆H₅)2PBCl₂}3 
• 16557-35-0 {(C₆H₅)2PBBr₂}3 

Relevant academic research and scientific papers

Phosphine- and amine-borane dehydrocoupling using a three-coordinate iron(II) β-diketiminate precatalyst

Dehydrocoupling of phosphine- and amine-boranes is reported using an iron(II) β-diketiminate complex. Dehydrocoupling of amine-boranes is far more facile than the phosphine counterpart, the former proceeding at room temperature with 1 mol% iron precatalys

Transition metal-catalyzed formation of phosphorus-boron bonds a new route to phosphinoborane rings, chains, and macromolecules

A novel catalytic dehydrocoupling route for the synthesis of linear, cyclic, and polymeric phosphinoboranes has been developed. The dehydrocoupling of neat Ph2PH·BH3, which is otherwise very slow below 170 °C, is catalyzed by [{Rh(μ-

Transition metal-catalyzed formation of phosphorus-boron bonds: A new route to phosphinoborane rings, chains and the first high polymers

A novel catalytic route for the formation of phosphorus-boron bonds has been developed. The dehydrogenative coupling of the phosphine-borane adducts Ph2PH·BH3 and PhPH2·BH3 is efficiently catalyzed by transition

Homogeneous catalytic dehydrogenation/dehydrocoupling of amine-borane adducts by the Rh(I) Wilkinson's complex analogue RhCl(PHCy2) 3 (Cy ) cyclohexyl)

The Rh(l) complex RhCI(PHCy2)3 (1) (Cy = cyclohexyl, C6H11) has been investigated as a catalyst for the dehydrogenation/dehydrocoupling of dimethylamine-borane adduct Me 2NH·BH3 (3) at 20 °C to afford the cyclic dimer [Me2N-BH2]2 (4). Unlike previously studied neutral and Cationic Rh(l) precatalysts such as [{Rh(μ-CI)(1,5-cod)} 2] and [Rh(1,5-cod)2]OTf (1,5-cod = 1,5-cyclooctadiene, C8H12, OTf = OSO2CF3) with weakly electron-donating ligands at the metal center, which are reduced to catalytically active Rh(0) species, catalytic dehydrogenation of 3 using 1 was found to occur in a homogeneous manner according to nanofiltration experiments, Hg(0) poisoning and kinetic studies. Moreover, the presence of the sterically bulky ligand PHCy2 in complex 1 has been found to significantly increase the rate of reaction previously reported for Wilkinson's catalyst RhCI(PPh3)3. The catalytic activity of 1 toward a range of other amine-borane adducts RR'NH · BH3 (e.g., RR' = 'Pr 2, MeBz, MeH) at 20 °C was also investigated. The third row transition metal analogue of 1, the lr(l) complex lrCI(PHCy2) 3 (2), was also explored as a catalyst for the dehydrocoupling of 3 and was found to exhibit much reduced catalytic activity compared to 1 but proved significantly more active for sterically encumbered substrates. Addition of the strong Lewis acid B(C6F5)3 as a co-catalyst to both 1 and 2 has been found to significantly increase the rate of the dehydrocoupling reactions in all cases. The Rh(l) complex 1 (but not the lr(l) analogue 2) was also found to be active for the catalytic dehydrocoupling of the phosphine-borane adduct Ph2PH·BH3 (14) at 60-90 °C to afford linear dimer Ph2PH-BH2-PPh 2-BH3 (15).

Increasing the lability of polarised phosphorus-phosphorus bonds

Diphosphanes with polarised P-P bonds react readily with Lewis acids like borane, gallium trichloride, or with elemental selenium, to give products arising from electrophilic attack at the more basic phosphorus atom and consecutive bond cleavage. Spectroscopic studies proved that the initial reaction with borane proceeds under preservation of the P-P bond to give a transient phosphane-borane which rearranged below ambient temperature. The results suggest that Lewis acid coordination decisively enhances the weakening of the polarised P-P bond. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.