Ambidentate Ligands Capable of Variable Bond Angles in the Coordination-Driven Self-Assembly of Discrete Pt Macrocycles

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• 作者：Ki-Whan Chi ; Chris Addicott ; Mi-Eun Moon ; Hyo Jin Lee ; Sung Chul Yoon ; Peter J. Stang
• 刊名：Journal of Organic Chemistry
• 出版年：2006
• 出版时间：August 18, 2006
• 年：2006
• 卷：71
• 期：17
• 页码：6662 - 6665
• 全文大小：101K
• 年卷期：v.71,no.17(August 18, 2006)
• ISSN：1520-6904

文摘

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Flexible, ambidentate pyridyl-carboxylate based donor ligandssuch as sodium 3-(3-pyridyl)benzoate, sodium 4-(3-pyridyl)benzoate, and potassium 4-(3-pyridyl)ethynylbenzoate self-assemble into discrete [2 + 2] macrocyclic species insteadof infinite networks when combined with a 90 platinum-containing acceptor. In each case, only one isomeric ensemble is selectively formed in high yield. All products arecharacterized by electrospray ionization mass spectrometry(ESI-MS) and ³¹P{¹H} and ¹H NMR spectroscopy. They arethe first examples of discrete supramolecules incorporatingflexible, ambidentate donor ligands. Despite their potentialversatility, these pyridyl-carboxylate donors adjust theirbonding directionality to accommodate a rigid platinumacceptor in the formation of one discrete ensemble.