Synthesis and Structure of Trinuclear Boryloxycarbyne Complexes

✍ Scribed by Holger Braunschweig; Carsten Kollann; Margot Koster; Ulli Englert; Matthias Müller

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 309 KB
• Volume: 1999
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/(sici)1099-0682(199912)1999:12<2277::aid-ejic2277>3.0.co;2-7

✦ Synopsis

The µ 3 -boryloxycarbyne complexes [{Fe(CO) 3 } 3 {µ 3 -COBCl-dichlorodiboranes(4) B 2 (NMe 2 ) 2 Cl 2 , respectively. The products are formed by a nucleophilic attack of the CO {NtBu( SiMe 3 )}} 2 ] (1) and[{(η 5 -C 5 H 5 )Ni} 3 {µ 3 -COBX(NR 2 )}µ 3 -CO] (2a: NR 2 = NtBu(SiMe 3 ), X = Cl; 2b: NR 2 = N(SiMe 3 ) 2 , oxygen atom at the boron centres with subsequent salt elimination. All compounds were characterized by IR and X = Cl; 2c: NR 2 = NMe 2 , X = BNMe 2 Cl) were obtained by reaction of the anionic complexes K 2 [{Fe(CO) 3 } 3 {µ 3 -CO} 2 ] multinuclear NMR spectroscopy, and the structures of 1 and 2c in the solid state were determined by single-crystal X-ray and K[{(η 5 -C 5 H 5 )Ni(CO)] with the corresponding chloroboranes Cl 2 BNR 2 {NR 2 = NtBu(SiMe 3 ), N(SiMe 3 ) 2 }, or 1,2-diffraction studies.