The versatile chemistry of niobium pentachloride with aliphatic amines: Aminolysis, metal reduction and C–H activation
作者:Riccardo Bondi、Fabio Marchetti、Guido Pampaloni、Stefano Zacchini
DOI:10.1016/j.poly.2015.08.001
日期:2015.11
equimolar mixture of [NbCl4(NEt2)]2, 1, and [NH2Et2][NbCl6], 2a; the former product constitutes the first example of structurally characterized Nb(V) chlorido–amido complex. The ammonium salts [NH3nPr][NbCl6], 2b, and [NH2iPr2][NbCl6], 2c, were isolated in 20–30% yields from the 1:1 reactions of NbCl5 with NH2nPr and NHiPr2, respectively. Cα–H bond activation and Nb(V) to Nb(IV) reduction took place in the
在二氯甲烷中,研究了NbCl 5与少量(1-2摩尔当量)一系列伯,仲和叔胺的反应。1:NbCl 1反应5与NHEt 2干净,得到的[NbCl的等摩尔混合物4(NET 2)] 2,1,和[NH 2的Et 2 ] [NbCl 6 ],2A ; 前一种产品构成了具有结构特征的Nb(V)氯酰氨基复合物的第一个实例。铵盐[NH 3 n Pr] [NbCl 6 ],2b和[NH 2从NbCl 5与NH 2 n Pr和NH i Pr 2的1:1反应中分别分离出i Pr 2 ] [NbCl 6 ], 2c,产率为20%至30%。在NbCl 5与NR 3(R = Bz,Et; Bz = CH 2 Ph)的反应中发生Cα–H键活化和Nb(V)还原为Nb(IV)。亚胺盐[(PhCH 2) 2 NCHPh] [NbCl 6 ], 3和铵离子[NH(CH 2 Ph) 3 ] +被鉴定为由1:1 NbCl 5 / NBz