Eur. j. inorg. chem. Eur. j. inorg. chem. Iridium(III) Complexes Bearing Chelating Bis-NHC Ligands and Their Application in the Catalytic Reduction of Imines Aznarez Francisco Iglesias Manuel Universidad de Zaragoza Hepp Alexander Veit Benjamin Sanz Miguel Pablo J. Universidad de Zaragoza Oro Luis A. Universidad de Zaragoza Jin Guoxin Hahn F.Ekkehardt 2016 research-article