N-Heterocylic ligands have recently become more and more attractive in homogeneous catalysis and organic synthesis because their organometallic complexes usually exhibit higher reactivity and better stability than those with phosphine ligands.[1] Tridentate NNN ligands such as Pybox,[2] 2, 6-bisACHTUNGTRENNUNG (imino) pyridines,[3] terpyridines,[4] and other symmetrical NNN ligands [5] have demonstrated their potential ...