Formation of stable iron/cobalt NHC complexes via unexpected ring opening and in situ generation of a tridentate ligand†
Abstract
The reactions of FeCl2 and CoCl2 with a bistriazolium salt yields the NHC complexes [FeIII(L1111)2]I·H2O, [FeIII(L2222)2]PF6·CH3CN and [CoIII(L1111)2]I·0.5CH3CN, through an unusual ring opening of one of the triazoyl rings, which leads to the formation of C,N,O tridentate