title: Synthesis of ligands containing N-oxide donor atoms and their assembly into metallosupramolecular structures.
abstract: 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 Co2+ ([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.
authors: Department of Chemical and Biological Sciences, University of Huddersfield, Huddersfield, HD1 3DH, UK.
authors: Samantha J
authors: SJ
authors: Bullock
authors: Lindsay P
authors: LP
authors: Harding
authors: Michelle P
authors: MP
authors: Moore
authors: Andrew
authors: A
authors: Mills
authors: Sean A F
authors: SA
authors: Piela
authors: Craig R
authors: CR
authors: Rice
authors: Liz
authors: L
authors: Towns-Andrews
authors: Martina
authors: M
authors: Whitehead