(Pyrazol-1-ylmethyl)pyridine palladium complexes: Synthesis, molecular structures, and activation of small molecules

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• 作者：Stephen O. Ojwach ; Ilia A. Guzei ; J. Darkwa
• 关键词：Synthesis ; Molecular structures ; (Pyrazol-1-yl)pyridine palladium complexes ; Ethylene polymerization ; Insertion sulfur dioxide and carbon monoxide
• 刊名：Journal of Organometallic Chemistry
• 出版年：2009
• 出版时间：15 April 2009
• 年：2009
• 卷：694
• 期：9-10
• 页码：1393-1399
• 全文大小：508 K

文摘

Reactions of 2-(3,5-dimethylpyrazol-1-ylmethyl)pyridine (L1) and 2-(3,5-di-tert-butylpyrazol-1-ylmethyl)pyridine (L2) with either [PdClMe(COD)] or [PdCl₂(COD)] gave the mononuclear palladium complexes [PdCl₂(L1)] (1), [PdClMe(L1)] (2) [PdCl₂(L2)] (3) and [PdClMe(L2)] (4) in good yields. All compounds were characterized by NMR spectrometry, mass spectrometry, elemental analyses and also by single crystal X-ray crystallography for complexes 1, 3, and 4. The reaction of 2 with NaBAr₄ in NCMe gave the salt, [[PdMeNCMe(L3)]BAr₄ (5), in good yield. This salt was used as a catalyst to oligomerize ethylene at high pressures to branched polyethylene, but catalytic activity was low. The reaction of 2 with SO₂ and CO formed the respective insertion products [PdClS(O)₂Me(L1)] (6) and [PdClC(O)Me(L1)] (7).