Diazadienes in lanthanide chemistry: transformation in the diamide and enamine amide ligand systems. Synthesis, structures, and properties of complexes (2,6-Pri 2C6H3N-C(=CH2)C(=CH2)-NC6H3Pri 2-2,6)-Yb(THF)2(μ-Cl)2Li(THF)2 and (2,6-Pri 2C6H3N(H)C(Me)=C(Me)-NC6H3Pri 2-2,6)GdCl(THF)(μ-Cl)2Li(THF)2
摘要:
通过1,4-双(2,6-二异丙基苯基)-2,3-二甲基-1,4-二氮杂-1,3-丁二烯与等摩尔量的BunLi和YbCl3(1:1)反应,原位得到锂酰胺衍生物[2,6-Pri 2C6H3N-C(=CH2)C(=CH2)-NC6H3Pri 2-2,6][Li(THF) n ]2,其与无水YbCl3反应得到含有二酰胺片段[N-C(=CH2)-C(=CH2)-N]Yb的金属环状酸盐络合物[2,6-Pri 2C6H3N-C(=CH2)C(=CH2)-NC6H3Pri 2-2,6]Yb(THF)2(μ-Cl)2Li(THF)2 (1)。在THF中,二锂衍生物[(2,6-Pri 2C6H3NC(Me)=C(Me)NC6H3Pri 2-2,6)]2−[Li+(THF) n ]2与GdCl3(摩尔比为1:1)反应,不会形成含有二阴离子烯二酰胺配体的钆络合物,而是通过一个