The work reported in this thesis is divided into three parts. In the first part, the synthesis of Zn-Au heterometallic complexes is described by using bifunctional carboxy-phosphine ligands. The second part of this thesis focuses on redox reactions between divalent lanthanides (LnII) and transition metal (TM) carbonyl complexes for the synthesis of high nuclearity heterometallic complexes. The third and final part of this thesis focuses on reactivity studies of [Cp*Fe(Л5-P5)] with lowvalent main group compounds.