Citation: Xiao-Peng HU, Zhi-Feng WANG, Wei DENG, Jin TONG, Shu-Yan YU. Molecular Structures and Catalytical Performance in Suzuki-coupling Reaction of Novel Dipalladium Clip-shaped Complexes with Bifunctional Pyrazolate Ligands[J]. Chinese Journal of Structural Chemistry, ;2021, 40(7): 843-850. doi: 10.14102/j.cnki.0254-5861.2011-3174 shu

Molecular Structures and Catalytical Performance in Suzuki-coupling Reaction of Novel Dipalladium Clip-shaped Complexes with Bifunctional Pyrazolate Ligands

Laboratory for Self-assembly Chemistry, Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Environment and Life, Beijing University of Technology, Beijing 100124, China

Corresponding author: Shu-Yan YU, selfassembly@bjut.edu.cn
Received Date: 11 March 2011
Accepted Date: 27 May 2021

Fund Project: the Beijing Natural Science Foundation of China 2212002National Natural Science Foundation of China 21906002National Natural Science Foundation of China 21471011the Beijing Municipal Science and Technology Project KM202010005010the Beijing Municipal High Level Innovative Team Building Program IDHT20180504the Beijing Outstanding Young Scientist Program BJJWZYJH01201910005017

Figures(5)

A series of clip-shaped cationic molecular corners C1~C4 (C1 = [(bpy)₂Pd₂(L¹)₂]²⁺, C2 = [(dmbpy)₂Pd₂(L¹)₂]²⁺, C3 = (bpy)₂Pd₂(L²)₂]²⁺, C4 = (dmbpy)₂Pd₂(L²)₂]²⁺, bpy = 2, 2-bipyridine, dmbpy = 4, 4΄-dimethyl-2, 2-bipyridine) were synthesized through dipalladium complexes [(bpy)₂Pd₂(NO₃)₂](NO₃)₂, [(dmbpy)₂Pd₂(NO₃)₂](NO₃)₂ and bifunctional pyrazole ligands 4-(3, 4-dimethoxyphenyl)-3, 5-dimethyl-1H-pyrazol (HL¹) and 4, 4΄-(5-(1H-pyrazol-4-yl)-1, 3-phenylene)dipyridine (HL²). Complexes C1~C4 were characterized by ¹H and ¹³C NMR, electrospray ionization mass spectrometry (ESI-MS), elemental analysis, and IR spectroscopy. The X-ray diffraction analysis of C1∙2NO₃⁻ revealed a Pd₂ dimetallic clip-shaped structure which was synthesized by two bifunctional ligands doubly bridged by the [(bpy)Pd]₂ dimetal units. Additionally, all of the complexes with NO₃⁻ as counter anions exhibited high-efficiency catalytical performance in the Suzuki-coupling reaction attributed to the tunable impact and weak dinuclear Pd(Ⅱ)…Pd(Ⅱ) intramolecular bonding interaction.
- dipalladium supra molecules,
- bifunctional pyrazolate ligands,
- catalysis,
- Suzuki-coupling reaction
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