Clathrochelate Complexes Containing Axial Cymantrene and Tromancenium Moieties

New clathrochelate complexes of manganese, iron and cobalt containing peripheral organometallic manganese moieties cymantrene or tromancenium were synthesized via self-assembly from di/tri-topic dioximes, metal templates and cymantrene/tromancenium boronic acid pinacol esters. These air-stable, highly colored, oligometallic complexes are composed of various combinations of (MnFeMnI)-Fe-I-Mn-II, (MnCoMnI)-Co-I-Mn-II, (MnMnMnMnI)-Mn-I-Mn-II-Mn-II and (MnCoCoMnI)-Co-I-Co-II-Mn-II metal assemblies with corresponding complicated magnetic and electrochemical properties. Full spectroscopic and structural characterization by H-1/B-11/C-13 NMR, HRMS, IR, UV-vis, single crystal XRD and CV (cyclic voltammetry) is provided. Tetrametallic complexes containing tromanceniumyl substituents with two Co-II or Mn-II central metals exhibit promising anticancer properties against different tumor cell lines.