Synthesis of a chelating hexadentate ligand with a P3N3 donor set. Crystal and molecular structure of [OC-6-22]-[Co{(RP*,RP*,RP*)-CH3C(CH2PPhC6H4NH2-2)3}](PF6)3
作者:Justine Bennett、Roy J. Doyle、Geoffrey Salem、Anthony C. Willis
DOI:10.1039/b607847h
日期:——
The first structurally authenticated example of a hexadentate chelating tertiary phosphine in which all six donors are bound to a single metal centre is described. The multidentate ligand (RP*,RP*,RP*)- and (RP*,RP*,SP*)-CH3C(CH2PPhC6H4NH2-2)3 has been prepared in 80% yield via the reaction of five equivalents of sodium (2-aminophenyl)phenylphosphide (generated in situ from (2-aminophenyl)phenylphosphine
描述了六齿螯合叔膦的第一个结构上经过验证的实例,其中所有六个供体都结合在一个金属中心上。多齿配体(RP *,RP *,RP *)-和(RP *,RP *,SP *)-CH3C(CH2PPhC6H4NH2-2)3通过五当量的钠(2 -氨基苯基)苯基磷(由(2-氨基苯基)苯基膦和钠在原位生成)与1,1,1-三(溴甲基)乙烷在三氟乙烷中。非对映异构体混合物已与钴(III)络合,形成了一对络合物,即。[Co (RP *,RP *,RP *)-CH3C(CH2PPhC6H4NH2-2)3}] Cl3和[CoCl (RP *,RP *,SP *)-CH3C(CH2PPhC6H4NH2-2)3}] Cl2,通过离子交换色谱分离。前者的结构(作为相应的六氟磷酸盐)已通过X射线晶体学证实,清楚地显示了P3N3配体的所有六个供体均与一个钴(III)中心配位。具有内部N供体和末端二苯基膦基的相关六齿配体,即