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

作者：Das Amrita; Choudhury Somnath Ray^*; Manna Prankrishna; Baxter Dominic; Helliwell Madeleine; Mukhopadhyay Subrata

来源：Polyhedron, 2011, 30(12): 2121-2126.

DOI：10.1016/j.poly.2011.05.031

• Self-assembly
• Mg(II) complex
• Lone pair-pi interaction
• Anion-pi interaction
• Sandwich topology
• Molecular recognition

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 pair center dot center dot center dot pi and anion center dot center dot center dot pi interactions in influencing the self-assembly process appears to be of importance. A rare combination of lone pair center dot center dot center dot pi and anion center dot center dot center dot pi interactions in 1, of the type lone pair center dot center dot center dot pi/pi center dot center dot center dot pi/pi center dot center dot center dot anion, is observed, and this unusual supramolecular network is fully described here.

• 出版日期2011-8-2