-butylphosphanyl- P )ethyl]cyclopentadienyl}cobalt chelate was treated with trimethylsilylethyne to give the corresponding alkyne complex along with the trimethylsilylvinylidene complex. In a similar way, the bis(trimethylsilyl)ethyne complex was obtained. Silyl migration to give the bis(trimethylsilyl)vinylidene complex was observed at elevated temperature and represents the first cobalt example of this reaction
Improved Access to {[ω‐(Phosphanyl)alkyl]cyclopentadienyl}cobalt(I) Complexes: Decomplexation of the Phosphane Arm; Alkyne Complexes; Synthesis of Mononuclear Vinylidenecobalt(I) Complexes
phosphane arm at room temperature with formation of 7, 5, 6, 8. The ethene ligand in 4 can be replaced by alkynes under equally mild reaction conditions (formation of 9, 11 – 16). The reaction with ethyne results in the formation of vinylidene complex 10. The yields of the reactions with nonaromatic alkynes could be improved by treating 3 with the alkyne in the presence of sodium amalgam. The unsubstituted
Reactions of a Chelated Cyclopentadienylcobalt(I) Complex with 3,3-Disubstituted Cyclopropenes: Formation of Isoprene, Vinylcarbene, and 1-Phosphadiene Ligands at the Metal
(Di-tert-butylphosphanyl-P-ethyl)cyclopentadienylcobalt(I) complexes 1 and 2 were treated with 3,3-disubstituted cyclopropenes to give isoprene and vinylcarbene complexes. The diphenylvinylcarbene complex reacted with tert-butylphosphaethyne to give unusual coupling products.
(二-叔-butylphosphanyl- P -乙基)cyclopentadienylcobalt(I)络合物1和2,用3,3-二取代的环丙烯处理,得到异戊二烯和vinylcarbene络合物。二苯基乙烯基卡宾配合物与叔丁基磷乙炔反应生成不寻常的偶联产物。
Reaction of a cyclopentadienylcobalt(I) phosphane chelate with trimethylsilyl chloride and some pseudohalides: unanticipated formation of new cyclopentadienylcobalt(II) and (III) chelates
Some reactions of the (phosphanylethyl)cyclopentadienylcobalt(I) chelate complex 1 with trimethylsilyl chloride and some pseudohalides were investigated. Reaction of 1 with trimethylsilyl chloride, azide, isocyanate, and isothiocyanate gave cobalt(II) chelates 2, 3, 4, and 5, some of which were structurally characterized. In contrast to these reactions, treatment of 1 with trimethylsilylcyanide resulted
Oxidative Addition of Hydrosilanes, Hydrogermane, and Hydrostannane to Cyclopentadienylcobalt(I) Bearing a Pendant Phosphane Ligand: Cyclopentadienylhydridocobalt(III) Chelate Complexes with Silyl, Germyl, and Stannyl Ligands
Oxidative addition of hydrosilanes, a hydrogermane, and a hydrostannane to the ((cyclopentadienylalkyl)phosphane)cobalt(I) chelate 1 results in the formation of cyclopentadienylhydridocobalt(III) complexes having a tethered phosphorus ligand and silyl (rac-4−rac-8), germyl (rac-10), and stannyl substituents (rac-11). The pseudo-four-coordinate complexes are chiral. The X-ray structures of 5 and 7 have