Abstract
The combination of well-established meridionally coordinating, tridentate pincer ligands with group 15 elements affords geometrically constrained non-trigonal pnictogen pincer compounds. These species show remarkable activity in challenging element–hydrogen bond scission reactions, such as the activation of ammonia. The electronic structures of these compounds and the implications they have on their electrochemical properties and transition metal coordination are described. Furthermore, stoichiometric and catalytic bond forming reactions involving B–H, N–H and O–H bonds as well as carbon nucleophiles are presented.
Highlights
Coordinating pincer ligands are well established in modern transition metal chemistry and have found numerous applications, e.g. in catalysis and small molecule activation.[1,2,3]
Due to their high rigidity, well-de ned complexes are readily accessible, and their reactivity can be modi ed by variation of the ligand substituents.[4]. Many examples of this class of compounds are suitable for bond activation reactions due to their partially lled d-orbitals which allow for biphilic bond
Radosevich and co-workers showed that I reacts with ammonia borane (AB) to yield the formal oxidative addition product 12 with no intermediates to be detected when the reaction is followed by NMR spectroscopy.[74]
Summary
Coordinating pincer ligands are well established in modern transition metal chemistry and have found numerous applications, e.g. in catalysis and small molecule activation.[1,2,3] Due to their high rigidity, well-de ned complexes are readily accessible, and their reactivity can be modi ed by variation of the ligand substituents.[4] Many examples of this class of compounds are suitable for bond activation reactions due to their partially lled d-orbitals which allow for biphilic bond. Goicoechea at the University of Oxford funded by the Walter-Benjamin-Programm of the Deutsche Forschungsgemeinscha His current research interest is focused on the development of new main-group element compounds for catalytic applications in organic chemistry. The rich reactivity towards E–H bonds and carbon nucleophiles is described and contextualized with theoretical results
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