New three- and four-armed flexible bridging ligands for use in metallosupramolecular chemistry: syntheses and X-ray structures
摘要:
Preparations are described of twelve new tritopic and tetratopic ligands by coupling of two phenolic precursors with a range of heterocyclic units. X-ray crystal structures of four representative examples revealed the conformations in the solid state with the nitrogen donor atoms separated by distances ranging from 10.9 to 18.2 angstrom. (C) 2009 Elsevier Ltd. All rights reserved.