2-Substituted vs 2,9-Disubstituted Phenanthroline-NiII-halides: Speciation Control and Structural Elucidation in Solution

High Resolution Image Download MS PowerPoint Slide Herein we study the structures of selected 2,9-disubstituted and 2-monosubstituted phenanthroline Ni II -dibromido and diiodido complexes via SC-XRD, SQUID magnetometry, UV–vis–NIR and DOSY NMR. In spite of the divergent speciation in solid state and in DMF solution, the Ni II -dibromido complexes of both mono- and disubstituted phenanthrolines converge to monomeric species in both THF and CDCl 3 . On the other hand, the nickel iodide complexes remain as monomers both in solid state and in solution, regardless of ligand substitution patterns.