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Three‐Coordinate Boron(III) and Diboron(II) Dications
Author(s) -
Franz Daniel,
Szilvási Tibor,
Pöthig Alexander,
Deiser Franziska,
Inoue Shigeyoshi
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.201800609
Subject(s) - dication , chemistry , boron , hydride , ligand (biochemistry) , medicinal chemistry , crystallography , inorganic chemistry , molecule , metal , organic chemistry , biochemistry , receptor
The enhanced electron‐donor properties of the bulky bisimino ligand 1,2‐(L Mes N) 2 ‐C 2 H 4 ( 1 ; L Mes =1,3‐bis(mesityl)‐imidazolin‐2‐ylidene), mesityl=2,4,6‐trimethylphenyl) were exploited for the stabilization of elusive electron‐deficient and low‐coordinate boron dication species. The reaction of 1 with PhBBr 2 or (B(Cl)NMe 2 ) 2 afforded a dicationic mononuclear boron(III) complex or a dicationic dinuclear boron(II) complex, respectively ( 4 2+ , 6 2+ ). The bonding situations of 4 2+ and 6 2+ were examined by means of single crystal X‐ray diffraction analysis, as well as theoretical methods. Significant allocation of positive charge density into the ligand system was diagnosed for both dications. However, the metalloid‐centered Lewis acidity of the dications was confirmed via hydride transfer reactions.