“…The synthesis of alternative ligands to stabilize dinuclear complexes and control their reactivity is an area of great importance in coordination and organometallic chemistry (for recent literature see: Das et al, 2008;Estevan et al, 2006;Jie et al, 2007;Müller & Vogt, 2007;Schilling et al, 2008). In this context, we have focused our attention to the synthesis of 1,3-bis(aryl)triazenes as precursors for triazenido ligands bearing Lewis basic ortho substituents such as ester, methoxy and methylmercapto groups (Nuricumbo-Escobar et al, 2007;Ríos-Moreno et al, 2003;Rodríguez et al, 1999;Tejel et al, 2004); it has been found that the nature of the substituent produces a dramatic impact on their coordination chemistry and reactivity.…”