Synthesis and Complexation of “Back-to-Back” Capped Bis-dioxocyclams
journal contributionposted on 08.08.2005, 00:00 by Jun Mo Gil, Scott David, Angela L. Reiff, Louis S. Hegedus
Pyridine-capped 5,12-dioxocyclams were coupled “back-to-back” directly, with one or two intervening phenyl groups, an ethynyl group, or a diazo group via Suzuki, Sonogashira, or reductive coupling of the 4-nitropyridine monocyclam. These bis-dioxocyclams linked through extended π-conjugated systems were complexed to copper(II) and cobalt(III), producing bis-metal complexes which were characterized spectroscopically and electrochemically. These studies gave little evidence for electronic communication between metal centers across the π-conjugated linkers.