Lanthanide and group 4 metal complexes with new chiral biaryl-based NNO-donor ligands
作者:Guofu Zi、Qiuwen Wang、Li Xiang、Haibin Song
DOI:10.1039/b808238c
日期:——
A new series of lanthanide and group 4 metal complexes have been prepared from the reactions between Ln[N(SiMe(3))(2)](3) or M(NMe(2))(4) and chiral ligands, (R)-2-(pyrrol-2-ylmethyleneamino)-2'-methoxy-1,1'-binaphthyl (H), (S)-5,5',6,6',7,7',8,8'-octahydro-2-(pyrrol-2-ylmethyleneamino)-2'-methoxy-1,1'-b inaphthyl (H) and (R)-2-(pyrrol-2-ylmethyleneamino)-2'-methoxy-6,6'-dimethyl-1,1'-biphenyl (H)
从Ln [N(SiMe(3))(2)](3)或M(NMe(2))(4)与手性配体(R )-2-(吡咯-2-基亚甲基氨基)-2'-甲氧基-1,1'-联萘基(H),(S)-5,5',6,6',7,7',8,8' -八氢-2-(吡咯-2-基亚甲基氨基)-2'-甲氧基-1,1'-b萘基(H)和(R)-2-(吡咯-2-基亚甲基氨基)-2'-甲氧基-6, 6'-二甲基-1,1'-联苯(H)。配体的空间效应以及离子的尺寸效应在镧系元素络合物的形成中起着重要作用。例如,用1当量的Ln [N(SiMe(3))(2)](3)(Ln = Y,Yb)在甲苯中处理H得到三-连接的配合物()(3)YC(7 )H(8)(.C(7)H(8))和()(3)Yb.2C(7)H(8)(.2C(7)H(8))且收率高;H与1当量Sm [N(SiMe(3))(2)](3)的反应也产生了tris连接产物()(3)Sm(),而H与1当量Ln