A series of N‐substituted iminopyridine ligand‐based arene–Ru^II complexes with general formula [(η⁶‐arene)Ru(C₅H₄N‐2‐CH=NR)Cl]⁺ was synthesized and characterized by NMR spectroscopy, mass spectrometry, and single‐crystal X‐ray diffraction studies. The synthesized arene–Ru^II complexes showed high activity in the regioselective Markovnikov hydration of a range of aromatic and aliphatic terminal alkynes and produced moderate to good yields of the corresponding methyl ketones. Moreover, the Ru^II catalysts studied showed good recyclability. The mechanism of the Ru^II‐catalyzed hydration reaction was investigated in detail by performing mass experiments and control experiments, followed by the identification of crucial Ru^II–alkyne and Ru^II–vinyl organometallic species.

中文翻译：

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N取代的氨基吡啶芳烃-钌配合物用于末端炔烃的区域选择性催化水合

一系列的N-取代基的配体亚氨基吡啶芳烃-钌^II络合物与通式[（η ⁶ -arene）的Ru（C ₅ H ^ ₄ N-2-CH = NR）CL] ⁺的合成和表征通过NMR光谱，质谱和单晶X射线衍射研究。合成的芳烃-Ru ^II配合物在一系列芳香族和脂肪族末端炔烃的区域选择性马尔可夫尼科夫水合作用中表现出高活性，并产生中等至良好产率的相应甲基酮。而且，所研究的Ru ^II催化剂显示出良好的可回收性。汝^二世的机制通过进行大量实验和对照实验，详细研究了催化水合反应，然后鉴定了关键的Ru ^{II –}炔烃和Ru ^II –乙烯基有机金属物种。