摘要:
Here we report the synthesis and characterization of a series of palladium beta-diiminate complexes. Chloro-bridged dimers [Pd(Ar(2)nacnac)(mu-Cl)](2) (where [Ar(2)nacnac] is [(ArNC(CH3))(2)CH] with Ar being aryl substituents) can serve as versatile starting materials, and can be cleaved by neutral monodentate ligands (L) to form mononuclear complexes [Pd(Ar(2)nacnac)(L)Cl], or engage in unusual transmetallation reactions with boronic acids to form tetrapallada-macrocycles. The reactivity of the tetrapallada-macrocyclic complexes towards L-type ligands, as well as the reactivity of Pd(Ar(2)nacnac)(L)Cl] complexes towards boronic acids was also also explored. (C) 2011 Elsevier B.V. All rights reserved.