Activation of H<sub>2</sub> by Phosphinoboranes R<sub>2</sub>PB(C<sub>6</sub>F<sub>5</sub>)<sub>2</sub>
作者:Stephen J. Geier、Thomas M. Gilbert、Douglas W. Stephan
DOI:10.1021/ja805493y
日期:2008.9.24
Phosphinoboranes that combine bulky electron-rich phosphides and electron deficient B(C(6)F(5))(2) fragments produce monomeric phosphinoboranes that undergo facile addition of H(2) to give the phosphine-borane adducts (R(2)PH)(HBR'(2)). This finding in combination with DFT calculations shed light on the uptake of H(2) across a group 13-group 15 bond, a critical requirement for the development of recyclable H(2) storage materials.
Coordination of Phosphinoboranes R<sub>2</sub>PB(C<sub>6</sub>F<sub>5</sub>)<sub>2</sub> to Platinum: An Alkene-Type Behavior
The paucity of boron-containing heteroalkene complexes prompted us to explore the coordination of phosphinoboranes. The complexes [R2PB(C6F5)(2)]Pt(PPh3)(2)} (R = Cy, t-Bu) were obtained by ethylene displacement. Spectroscopic and crystallographic data indicated symmetric side-on coordination of the phosphinoborane to Pt. Thorough analysis of the bonding situation by computational means revealed important similarities but also significant differences between the phosphinoborane and ethylene complexes.