The coordination preferences of metal centres modulate superexchange coupling interactions in a metallo-supramolecular helical assemblyElectronic supplementary information (ESI) available: Synthesis and experimental data for H2Land complexes [Cu2(L)2], [Ni2(L)2]. CIF files, ORTEP diagrams, selected bond distances and angles for 1and 2. Ancillary figures relative to the magnetic studies. CCDC 767303and 767304. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c0cc00338g

A method to modulate the strength of the superexchange coupling interaction in dinuclear helical assemblies based on the coordination preferences of the metal centres is described. [ABSTRACT FROM AUTHOR]