Associative combination of lone pair–π, π–π and anion–π interactions observed in a ternary system comprising Mg(II)-malonate–2-aminopyridine–hexafluoridophosphate

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• 作者：Amrita Das^a ; Somnath Ray Choudhury^a ; ^b ; ^{som_rc_ju@yahoo.co.in"" rel=""nofollow} ; Prankrishna Manna^a ; Dominic Baxter^c ; Madeleine Helliwell^c ; Subrata Mukhopadhyay^a ; ^{smukhopadhyay@chemistry.jdvu.ac.in"" rel=""nofollow}
• 关键词：Self-assembly ; Mg(II) complex ; Lone pair– ; π ; interaction ; Anion– ; π ; interaction ; Sandwich topology ; Molecular recognition
• 刊名：Polyhedron
• 出版年：2011
• 出版时间：2 August 2011
• 年：2011
• 卷：30
• 期：12
• 页码：2121-2126
• 全文大小：822 K

文摘

One Mg(II) malonate complex with protonated 2-aminopyridine and hexafluoridophosphate as counterions, (C₅H₇N₂)₄[Mg(C₃H₂O₄)₂(H₂O)₂](PF₆)₂ (1) [C₅H₇N₂ = protonated 2-aminopyridine, C₃H₄O₄ = malonic acid] has been synthesized from purely aqueous media just by mixing the reactants in their stoichiometric proportion and its crystal structure has been determined by single-crystal X-ray diffraction. The role of weak forces like lone pairπ and anionπ interactions in influencing the self-assembly process appears to be of importance. A rare combination of lone pairπ and anionπ interactions in 1, of the type lone pairπ/ππ/πanion, is observed, and this unusual supramolecular network is fully described here.