Affiliation:
1. Department of Chemistry and Green‐Nano Materials Research Center Kyungpook National University Daegu‐city 702‐701 Republic of Korea
2. Jeonju Center Korea Basic Science Institute (KBSI) Jeonju‐city 561‐180 Republic of Korea
3. Research Division for Biotechnology, Advanced Radiation Technology Institute Korea Atomic Energy Research Institute (KAERI) Jeonbuk 580‐185 Republic of Korea
Abstract
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.