(LN∩NPh). The single-crystal X-ray structure analysis of complexes 1–3 confirms a trans arrangement of the two acetato groups and of the two nitrogen atoms. Orthometalation leading to palladacycles is impossible in all cases as the ortho positions in the benzylic rings are blocked by methyl substituents. All complexes are found to catalyze Suzuki cross-coupling reactions of deactivated and even sterically
反式构型方形平面
钯配合物 [Pd(OAc)2(LNtBu)2] (1), [Pd(OAc)2(η2-LN∩NtBu)] (2), [Pd(OAc)2(LNPh) )2] (3) 和 [Pd(OAc)2(η2-LN∩NPh)] (4) 是通过用胺 NHtBu -2,4,6-Me3C6H2 (LNtBu) 或 NHPh 处理
乙酸钯合成的-2,4,6-Me3C6H2 (LNPh) 或与二胺 NHtBu -2,4,6-Me3C6H-
CH2-2,4,6-Me3C6H- -NHtBu (LN∩NtBu) 或 NHPh- -2, 4,6-Me3C6H- -2,4,6-Me3C6H- -NHPh (LN∩NPh)。配合物 1-3 的单晶 X 射线结构分析证实了两个乙酰基和两个氮原子的反式排列。导致
钯环的邻位
金属化在所有情况下都是不可能的,因为苄环中的邻位被甲基取代基封闭。发现