The synthesis of molecules with new types of bonding and the investigation of their reactivity are the main themes of our research. Examples of the new types of molecules include those with formal double or triple bonds between elements such as aluminum, gallium, germanium or tin; quintuple bonds between transitions metals for example ArCrCRAr, two coordinate transition metal molecules and high oxidation state (+4) late transition metal complexes. Fundamental reactions involving hydrogen, ammonia, carbon monoxide or ethylene at room temperature were unknown for main group species until recently and are of great importance for several catalytic cycles as well as hydrogen transport and storage.