Synthesis of a C(sp 2 )‐bridged Phosphine‐Borane by Ionic Coupling | Zendy

Boudjelel Maxime | Zendy; Declercq Richard | Zendy; MalletLadeira Sonia | Zendy; Bouhadir Ghenwa | Zendy; Bourissou Didier | Zendy

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Synthesis of a C(sp 2 )‐bridged Phosphine‐Borane by Ionic Coupling

Author(s) -

Boudjelel Maxime,

Declercq Richard,

MalletLadeira Sonia,

Bouhadir Ghenwa,

Bourissou Didier

Publication year - 2020

Publication title -

zeitschrift für anorganische und allgemeine chemie

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.354

H-Index - 66

eISSN - 1521-3749

pISSN - 0044-2313

DOI - 10.1002/zaac.202000085

Subject(s) - borane , geminal , phosphine , chemistry , crystallography , nuclear magnetic resonance spectroscopy , electrophile , carbenoid , ionic bonding , monomer , stereochemistry , medicinal chemistry , ion , organic chemistry , catalysis , rhodium , polymer

The vinyl carbenoid H 2 C=CBr(Li) has been used as key precursor to prepare a geminal C(sp 2 )‐bridged phosphine‐borane. Starting from bromoethene, two sequences of lithiation/electrophilic trapping, with ClP i Pr 2 and FBMes 2 respectively, affords i Pr 2 P–C(=CH 2 )–BMes 2 3 [Mes = 2,4,6‐(H 3 C) 3 C 6 H 2 ]. This new phosphine‐borane 3 was characterized by multi‐nuclear NMR and mass spectroscopy. It adopts a monomeric open structure without P→B interaction. A few crystals of a secondary product 4 were analyzed by X‐ray diffraction, revealing an unusual dimeric structure.

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