Vanadium(IV) and -(V) Complexes with O,N-Chelating Aminophenolate and Pyridylalkoxide Ligands
作者:Henk Hagen、Chris Bezemer、Jaap Boersma、Huub Kooijman、Martin Lutz、Anthony L. Spek、Gerard van Koten
DOI:10.1021/ic991415s
日期:2000.9.1
[OCMe2([2]-Py)]- (2), have been applied in the synthesis of vanadium(V) complexes. The tertiary amine functionality in 1 caused reduction of the vanadium nucleus to the 4+ oxidation state with either [VOCl3], [V(=NR)Cl3], or [V(=NR)(NEt2)3] (R = Ph, (3a, 5a), R = p-Tol (3b, 5b)), and applying 1 as a reducing agent resulted in the synthesis of the vanadium(IV) complexes [VO(OC6H2(CH2NMe2)-2-Me2-4,6)2] (4)
应用了两种不同的单阴离子O,N螯合配体系统,即[OC6H2(CH2NMe2)-2-Me2-4,6]-(1)和[OCMe2([2] -Py)]-(2)。在钒(V)配合物的合成中。1中的叔胺官能团通过[VOCl3],[V(= NR)Cl3]或[V(= NR)(NEt2)3]导致钒核还原为4+氧化态(R = Ph, (3a,5a),R =对-Tol(3b,5b)),并且使用1作为还原剂导致钒(IV)配合物的合成[VO(OC6H2(CH2NMe2)-2-Me2-4, 6)2](4)和[V(= NPh)(OC6H2(CH2NMe2)-2-Me2-4,6)2](6)。在[V(= Np-Tol)(NEt2)(OC6H2(CH2NMe2)-2-Me2-4,6)2](7b)的情况下,还原速度足够慢,无法通过1H NMR进行表征,并且温度研究表明,它是溶液中的五坐标物种。尽管1与[V(= Np-Tol)(Oi