Synthesis of ligands containing N-oxide donor atoms and their assembly into metallosupramolecular structures

Samantha J. Bullock, Lindsay P. Harding, Michelle P. Moore, Andrew Mills, Sean A.F. Piela, Craig R. Rice, Liz Towns-Andrews, Martina Whitehead

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A series of ligands that contain both N-donor and N-oxide donor atoms have been synthesised and ligands L5, L6, L7 and L8 contain, 4, 6, 5, and 6 donor atoms respectively. The smallest ligand L5 forms a mononuclear complex with Cu2+ ([Cu(L5)(ClO4)2(MeCN)]) whereas L6 and L7 form dinuclear double helicates with Ni2+ and Cu2+ respectively ([Ni2(L6)2] 4+ and [Cu2(L7)2]4+). L8 forms a tetranuclear cyclic helicate upon reaction with Co 2+ ([Co4(L8)4]8+) and in all cases the complexes are characterised by single-crystal X-ray diffraction and ESI-MS. The N-oxide units imparts flexibility in the ligand strand and where the unoxidised ligand strand forms a cyclic helicate, the incorporation of an N-oxide unit allows the formation of the dinuclear double helicate.

Original languageEnglish
Pages (from-to)5805-5811
Number of pages7
JournalDalton Transactions
Issue number16
Publication statusPublished - 28 Apr 2013


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