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Synthesis and Structure of Trinuclear Boryloxycarbyne Complexes
Author(s) -
Braunschweig Holger,
Kollann Carsten,
Koster Margot,
Englert Ulli,
Müller Matthias
Publication year - 1999
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(199912)1999:12<2277::aid-ejic2277>3.0.co;2-7
Subject(s) - chemistry , boron , oxygen atom , nucleophile , salt (chemistry) , crystal structure , crystallography , nuclear magnetic resonance spectroscopy , solid state , infrared spectroscopy , x ray crystallography , medicinal chemistry , stereochemistry , inorganic chemistry , diffraction , molecule , catalysis , organic chemistry , physics , optics
The μ 3 ‐boryloxycarbyne complexes [{Fe(CO) 3 } 3 {μ 3 ‐COBCl{N t Bu(SiMe 3 )}} 2 ] ( 1 ) and [{(η 5 ‐C 5 H 5 )Ni} 3 {μ 3 ‐COBX(NR 2 )}μ 3 ‐CO] ( 2a : NR 2 = N t Bu(SiMe 3 ), × = Cl; 2b : NR 2 = N(SiMe 3 ) 2 , × = Cl; 2c : NR 2 = NMe 2 , × = BNMe 2 Cl) were obtained by reaction of the anionic complexes K 2 [{Fe(CO) 3 } 3 {μ 3 ‐CO} 2 ] and K[{(η 5 ‐C 5 H 5 )Ni(CO)] with the corresponding chloroboranes Cl 2 BNR 2 {NR 2 = N t Bu(SiMe 3 ), N(SiMe 3 ) 2 }, or 1,2‐dichlorodiboranes(4) B 2 (NMe 2 ) 2 Cl 2 , respectively. The products are formed by a nucleophilic attack of the CO oxygen atom at the boron centres with subsequent salt elimination. All compounds were characterized by IR and multinuclear NMR spectroscopy, and the structures of 1 and 2c in the solid state were determined by single‐crystal X‐ray diffraction studies.