Umpolung at Boron: Ancillary‐Ligand‐Induced Formation of Boron‐Based Donor Ligands from Phosphine‐Boranes | Zendy

Vondung Lisa | Zendy; Alig Lukas | Zendy; Ballmann Monika | Zendy; Langer Robert | Zendy

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Umpolung at Boron: Ancillary‐Ligand‐Induced Formation of Boron‐Based Donor Ligands from Phosphine‐Boranes

Author(s) -

Vondung Lisa,

Alig Lukas,

Ballmann Monika,

Langer Robert

Publication year - 2018

Publication title -

chemistry – a european journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.687

H-Index - 242

eISSN - 1521-3765

pISSN - 0947-6539

DOI - 10.1002/chem.201705847

Subject(s) - umpolung , chemistry , boranes , ligand (biochemistry) , borane , phosphine , boron , protonation , hydride , phosphine oxide , medicinal chemistry , lewis acids and bases , pincer ligand , frustrated lewis pair , reactivity (psychology) , photochemistry , polymer chemistry , organic chemistry , pincer movement , hydrogen , catalysis , medicine , ion , biochemistry , receptor , alternative medicine , pathology , nucleophile

Easy‐to‐prepare η 2 ‐coordinated phosphine‐borane ligands are demonstrated to liberate hydrogen upon treatment with different σ‐donor/π‐acceptor ligands (CO, t BuNC, CN − ). Depending on the utilized ancillary ligand, different reaction pathways are observed, ranging from simple hydride protonation to iron–boron bond formation and subsequent rearrangement to pincer‐type ligands based on a tricoordinate boron centre. The last‐named reactivity is in line with a formal umpolung at the boron centre from a Lewis acidic borane to a Lewis basic boron‐based donor ligand.

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