2,2′-Bi-1,6-naphthyridine metal complexes: a new ligand and a novel 2 × 2 inclined interpenetration of (4,4) nets or formation of helicoidal chains†

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He-Ping Wu, Christoph Janiak, Lars Uehlin, Peter Klüfers and Peter Mayer


Abstract

Cobalt(II), zinc(II) and cadmium(II) salts react with the new spacer ligand 2,2′-bi-1,6-naphthyridine 1 to give 2D-planar (4,4) frameworks which interpenetrate such that each grid window of each sheet has two other sheets passing through it with all sheets being equivalent whereas copper(I) tetrafluoroborate and 1 form a 21-helicoidal chain with neigboring chains interlocking through an aromatic π–π interaction.


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