Competition for Hydride Between Silicon and Boron: Synthesis and Characterization of a Hydroborane‐Stabilized Silylium Ion | Zendy

Gao Haopeng | Zendy; Müller Robert | Zendy; Irran Elisabeth | Zendy; Klare Hendrik F. T. | Zendy; Kaupp Martin | Zendy; Oestreich Martin | Zendy

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Competition for Hydride Between Silicon and Boron: Synthesis and Characterization of a Hydroborane‐Stabilized Silylium Ion

Author(s) -

Gao Haopeng,

Müller Robert,

Irran Elisabeth,

Klare Hendrik F. T.,

Kaupp Martin,

Oestreich Martin

Publication year - 2022

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.202104464

Subject(s) - hydride , chemistry , boron , silicon , ion , lewis acids and bases , cationic polymerization , characterization (materials science) , crystallography , hydrogen , inorganic chemistry , polymer chemistry , nanotechnology , organic chemistry , materials science , catalysis

Potent main‐group Lewis acids are capable of activating element‐hydrogen bonds. To probe the rivalry for hydride between silylium‐ and borenium‐ion centers, a neutral precursor with the hydrosilane and hydroborane units in close proximity on a naphthalene‐1,8‐diyl platform was designed. Abstraction of one hydride leads to a hydroborane‐stabilized silylium ion rather than a hydrosilane‐coordinated borenium ion paired with [B(C 6 F 5 ) 4 ] − or [HCB 11 Cl 11 ] − as counteranions. Characterization by multinuclear NMR spectroscopy and X‐ray diffraction supported by DFT calculations reveals a cationic, unsymmetrical open three‐center, two‐electron (3c2e) Si−H−B linkage.

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