The two star-shaped trimetal ethynyl complexes benzo[1,2-b:3,4-b':5,6-b'']trithiophene (BTT)][MCp*(dppe) 2 ] 3 ( 3 , M = Ru; 4 , M = Fe) are synthesized and characterized by NMR spectroscopy, elemental analysis and X-ray single crystal diffraction. The influence of different metals linked with identical bridge core on the electronic properties of 3 and 4 under various redox states are studied using electrochemical (cyclic and square wave voltammetry) and spectroelectrochemical (in situ UV-Vis-NIR and IR spectroscopy) methods and DFT calcula...