Synthesis and characterization of tantalum(V) metallaheterocycle (Me 2 N) 3 and chloro-mixed-amide (Me 2 N) 3 Ta(Cl)[N(SiMe 3 ) 2 ]
2003; NRC Research Press; Volume: 81; Issue: 11 Linguagem: Inglês
10.1139/v03-140
ISSN1480-3291
AutoresHu Cai, Xianghua Yu, Tianniu Chen, Xue-Tai Chen, Xiao‐Zeng You, Zi‐Ling Xue,
Tópico(s)Organoboron and organosilicon chemistry
ResumoA new mixed-amido complex (Me 2 N) 3 Ta(Cl)[N(SiMe 3 ) 2 ] (1) was prepared from the reaction of (Me 2 N) 3 TaCl 2 with 1 equiv. of LiN(SiMe 3 ) 2 . The reactions of 1 with 1 equiv. of LiN(SiMe 3 ) 2 or (Me 2 N) 3 TaCl 2 with 2 equiv. of LiN(SiMe 3 ) 2 gave (Me 2 N) 3 [Formula: see text] (2) with a four-membered metallaheterocyclic ring through γ-hydrogen abstraction. In the solid state, 1 adopts a distorted trigonal bipyramidal geometry with the -N(SiMe 3 ) 2 and -Cl ligands in the equatorial and axial positions, respectively. The X-ray structure of 2 reveals that it is in a distorted trigonal bipyramidal geometry with a planar metallaheterocyclic ring.Key words: tantalum, γ-hydrogen abstraction, C-H activation, amido complexes, metallacycle.
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