TY  - INPR
A1  - Cid, Jessica
A1  - Hermann, Alexander
A1  - Radcliffe, James E.
A1  - Curless, Liam D.
A1  - Braunschweig, Holger
A1  - Ingleson, Michael J.
T1  - Synthesis of Unsymmetrical Diboron(5) Compounds and Their Conversion to Diboron(5) Cations
T2  - Organometallics
N2  - Reaction of bis-catecholatodiboron-NHC adducts, B\(_2\)Cat\(_2\)(NHC), (NHC = IMe (tetramethylimidazol-2-ylidene), IMes (1,3-dimesitylimidazol-2-ylidene) or IDIPP (1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene)) with BCl3 results in the replacement of the catecholato group bound to the four coordinate boron with two chlorides to yield diboron(5) Lewis acid-base adducts of formula CatB-BCl\(_2\)(NHC). These compounds are precursors to diboron(5) monocations, accessed by adding AlCl\(_3\) or K[B(C\(_6\)F\(_5\))\(_4\)] as halide abstraction agents in the presence of a Lewis base. The substitution of the chlorides of CatB-BCl\(_2\)(NHC) for hydrides is achieved using Bu\(_3\)SnH and a halide abstracting agent to form 1,1-dihydrodiboron(5) compounds, CatB-BH\(_2\)(NHC). Attempts to generate diboron(4) monocations of formula [CatB-B(Y)(NHC)]\(^+\) (Y = Cl or H) led to the rapid formation of CatBY.
KW  - diboron
KW  - boronium cations
KW  - boron
KW  - Lewis acids
KW  - electrophiles
Y1  - 2018
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-164299
N1  - This document is the unedited Author's version of a Submitted Work that was subsequently accepted for publication in Organometallics, copyright © 2018 American Chemical Society after peer review. To access the final edited and published work see dx.doi.org/10.1021/acs.organomet.8b00288
ER  -