Organometallics Organometallics Experimental and Theoretical Mechanistic Investigation on the Catalytic CO2 Hydrogenation to Formate by a Carboxylate-Functionalized Bis(N -heterocyclic carbene) Zwitterionic Iridium(I) Compound Puerta-Oteo R. Hölscher M. Jiménez M.V. Universidad de Zaragoza Leitner W. Passarelli V. Pérez-Torrente J.J. Universidad de Zaragoza 2018 research-article