Predictions, Synthetic Strategy, and Isolation of a Linear Tetrametallic Triple‐Stranded Lanthanide Helicate

Complex twists: Following theoretical thermodynamic predictions, it is seen that the tetrametallic triple-stranded lanthanide helicate [Ln4L3]12+ (see structure) dominates the speciation in solution at millimolar concentrations, despite its high positive charge. Isolation of the europium complex in the solid state unambiguously establishes its nanometric triple-helical structure.