The N,N′‐bidentate [(
N
,
N
′)
PdCl2
] complexes [i.e., [
L
n
PdCl2
] (L
n
= L1–L5
)] were synthesized by the reaction of [Pd(
CH3CN
)
2Cl2
] with N‐methyl‐N‐(pyridin‐2‐ylmethyl)aniline (
L1
) and its derivatives (
L2–L5
) in ethanol. The molecular structures of [
L
n
PdCl2
] (L
n
= L1–L3
) were characterized using X‐ray crystallography, which showed that the Pd atom in the Pd(II) complexes had a square planar geometry involving two nitrogen atoms of N,N′‐bidentate and two chlorido ligands. The complexes [
L
n
PdCl2
] (L
n
= L1–L5
) were investigated for methyl methacrylate (MMA) polymerization in the presence of modified methylaluminoxane (MMAO) at 60 °C. Specifically, complex [
L1PdCl2
] showed moderate catalytic activity toward MMA polymerization with an activity of 3.03 × 104 g poly(methylmethacrylate) (PMMA)/mol Pd·h and PMMA syndiotacticity (characterized by
1H NMR spectroscopy) of ~0.68.
N,N′-二叉[(
N
,
N
′)
PdCl2
]复合物[即[.
L
n
PdCl2
] (L
n
= L1-L5
)] 的反应合成了[Pd(
CH3CN
)
2Cl2
]与 N-甲基-N-(吡啶-2-基甲基)苯胺 (
L1
) 及其衍生物 (
L2-L5
) 在乙醇中的分子结构。的分子结构。
L
n
PdCl2
] (L
n
= L1-L3
利用 X 射线晶体学对其进行了表征,结果表明,Pd(II) 复合物中的钯原子具有涉及 N,N′-二同位的两个氮原子和两个酰氯配体的正方形平面几何结构。配合物[...
L
n
PdCl2
] (L
n
= L1-L5
)在 60 °C、改性甲基铝氧烷(MMAO)存在下进行甲基丙烯酸甲酯(MMA)聚合反应的研究。具体来说,复合物 [
L1PdCl2
]对 MMA 聚合具有中等催化活性,活性为 3.03 × 104 g 聚甲基丙烯酸甲酯 (PMMA)/molPd-h,PMMA 的联合活性(通过
1H NMR 光谱)为 ~0.68。