Tantalum amido and imido complexes supported by tris[(2-indolyl)methyl]amine,a tetradentate trianionic ligand with reduced pi-donor character |
| |
Authors: | Tanski Joseph M Parkin Gerard |
| |
Institution: | Department of Chemistry, Columbia University, New York, New York 10027, USA. |
| |
Abstract: | Tris(2-indole)methyl]amine, N(CH2inH)3, may be readily obtained by reaction of methyl 2-bromomethyl-1-indolecarboxylate with NH3 followed by deprotection with NaOMe/MeOH. In its deprotonated form, N(CH2in)3]3- is an efficient tetradentate trianionic ligand for tantalum, as illustrated by the isolation and structural characterization of eta 4-N(CH2in)3]Ta(NAr)(NMe2H) (Ar = 2,6-C6H3Pri2), eta 4-N(CH2in)3]Ta(NMe2)2 and eta 4-N(CH2in)3]Ta(NMe2)Cl. The N(CH2in)3]3- ligand has a structural similarity to that of N(CH2CH2NR)3]3-, but differs electronically from the latter due to its reduced pi-donor capability, a direct result of the nitrogen being a component of the aromatic pi-system of the indolyl fragment. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|