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Facile dihydrogen release from phosphino-borinate ester Lewis pairs
Andy M Chapman1, Mairi F Haddow, Jonathan P H Orton
1School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
Dalton Transactions (Cambridge, England : 2003)
|June 15, 2010
Summary
New phosphino-borinate ester Lewis pairs were synthesized. These compounds readily release dihydrogen, indicating potential applications in catalysis and hydrogen storage.
Area of Science:
- Organometallic Chemistry
- Lewis Pair Chemistry
Background:
- Lewis pairs, comprising Lewis acids and bases, are crucial in catalysis.
- Phosphino-borinate esters represent an interesting class of Lewis pairs with tunable properties.
Purpose of the Study:
- To synthesize novel phosphino-borinate ester Lewis pairs.
- To investigate the reactivity of these new Lewis pairs, particularly their ability to release dihydrogen.
Main Methods:
- Synthesis of phosphino-borinate esters via reaction of phosphino-alcohols with bis(pentafluorophenyl)borane.
- Characterization of the synthesized compounds.
Main Results:
- Successful synthesis of phosphino-borinate ester Lewis pairs of the type (t)Bu(2)PCH(2)C(R)(2)OB(C(6)F(5))(2) for R = Me or CF(3).
- Demonstrated facile dihydrogen release from the corresponding zwitterionic species, (t)Bu(2)PHCH(2)C(R)(2)OBH(C(6)F(5))(2).
Conclusions:
- The new phosphino-borinate ester Lewis pairs are accessible synthetic targets.
- The facile dihydrogen release suggests potential for these compounds in hydrogen activation or storage applications.
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