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 Mn^IFe^IIMn^I, Mn^ICo^IIMn^I, Mn^IMn^IIMn^IIMn^I and Mn^ICo^IICo^IIMn^I metal assemblies with corresponding complicated magnetic and electrochemical properties. Full spectroscopic and structural characterization by ¹H/¹¹B/¹³C 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.