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@article{Bennett:2019:10.1002/anie.201900861,
author = {Bennett, EL and Lawrence, EJ and Blagg, RJ and Mullen, AS and MacMillan, F and Ehlers, AW and Scott, DJ and Sapsford, JS and Ashley, AE and Wildgoose, GG and Slootweg, JC},
doi = {10.1002/anie.201900861},
journal = {Angewandte Chemie - International Edition},
pages = {8362--8366},
title = {A new mode of chemical reactivity for metal-free hydrogen activation by Lewis acidic boranes},
url = {http://dx.doi.org/10.1002/anie.201900861},
volume = {58},
year = {2019}
}

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TY  - JOUR
AB  - We herein explore whether tris(aryl)borane Lewis acids are capable of cleaving H2 outside of the usual Lewis acid/base chemistry described by the concept of frustrated Lewis pairs (FLPs). Instead of a Lewis base we use a chemical reductant to generate stable radical anions of two highly hindered boranes: tris(3,5-dinitromesityl)borane and tris(mesityl)borane. NMR spectroscopic characterization reveals that the corresponding borane radical anions activate (cleave) dihydrogen, whilst EPR spectroscopic characterization, supported by computational analysis, reveals the intermediates along the hydrogen activation pathway. This radical-based, redox pathway involves the homolytic cleavage of H2 , in contrast to conventional models of FLP chemistry, which invoke a heterolytic cleavage pathway. This represents a new mode of chemical reactivity for hydrogen activation by borane Lewis acids.
AU  - Bennett,EL
AU  - Lawrence,EJ
AU  - Blagg,RJ
AU  - Mullen,AS
AU  - MacMillan,F
AU  - Ehlers,AW
AU  - Scott,DJ
AU  - Sapsford,JS
AU  - Ashley,AE
AU  - Wildgoose,GG
AU  - Slootweg,JC
DO  - 10.1002/anie.201900861
EP  - 8366
PY  - 2019///
SN  - 0570-0833
SP  - 8362
TI  - A new mode of chemical reactivity for metal-free hydrogen activation by Lewis acidic boranes
T2  - Angewandte Chemie - International Edition
UR  - http://dx.doi.org/10.1002/anie.201900861
UR  - https://www.ncbi.nlm.nih.gov/pubmed/30968535
UR  - https://onlinelibrary.wiley.com/doi/full/10.1002/anie.201900861
UR  - http://hdl.handle.net/10044/1/70282
VL  - 58
ER  -

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