Tantalum Amido and Imido Complexes Supported by <i>Tris</i>[(2-indolyl)methyl]amine, a Tetradentate Trianionic Ligand with Reduced π-Donor Character
作者:Joseph M. Tanski、Gerard Parkin
DOI:10.1021/ic026182a
日期:2003.1.1
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
通过使2-溴甲基-1-吲哚羧酸甲酯与NH 3反应,然后用NaOMe / MeOH脱保护,可以容易地获得三[(2-吲哚)甲基]胺N(CH 2 inH)3。[N(CH2in)3] 3-呈去质子化形式,是钽的有效四齿三阴离子配体,如[eta 4-N(CH2in)3] Ta(NAr)(NMe2H)的分离和结构表征所示Ar = 2,6-C6H3Pri2),[η4-N(CH2in)3] Ta(NMe2)2和[η4-N(CH2in)3] Ta(NMe2)Cl。[N(CH2in)3] 3-配体与[N(CH2CH2NR)3] 3-具有相似的结构,但由于其π-供体能力降低而与后者在电子上有所不同,直接的结果是氮是吲哚基片段的芳族π-系统的组分。