Assembly of Helicene‐Capped N,P,N,P,N‐Helicands within Cu^I Helicates: Impacting Chiroptical Properties by Ligand–Ligand Charge Transfer

Abstract

Combining helicate and helicene chemistry: Pentadentate phosphole-pyridine helicands (see scheme) coordinated to CuI or AgI centers afford configurationally stable double-stranded helicates bearing multiple bridging-phosphane coordination modes. Similarly enantiomerically pure helicene-grafted helicands afford enantiopure helicates.