Abstract Different synthetic routes have been explored for the synthesis of the sterically protected 2, 2′-dihydroxy-4, 3, 4, 3′-tetra-tert-butylazobenzene ligand (2), which is an excellent candidate for the development of valence tautomeric complexes. As expected, such a ligand exhibits good reactivity with transition-metal ions, as shown by the synthesis and characterization of the new cobalt complex [Co (2 2–)(H 2 O) 3] Cl· 2.5 EtOH· H 2 O (8 ...
