112383 20230519145420.0 doi 10.1002/hlca.202100044 sideral 125303 ART-2021-125303 eng Wilkinson, Eden-Taylor Strained Ruthenium Complexes Bearing Tridentate Guanidine-Derived Ligands 2021 Access copy available to the general public Unrestricted The dimer [{(η6-p-cymene)RuCl}2(μ-Cl)2] (cymene=MeC6H4iPr) reacts with N,N′-bis(p-tolyl)-N′′-(2-pyridinylmethyl)guanidine (H2L1) and N,N′-bis(p-tolyl)-N′′-(2-diphenylphosphanoethyl)guanidine (H2L2), in the presence of NaSbF6, giving rise to chlorido compounds of formula [(η6-p-cymene)RuCl(H2L)][SbF6] (H2L=H2L1 (1), H2L2 (2)) in which the guanidine ligand adopts a κ2 chelate coordination mode. The related ligand (S)-N,N′-bis(p-tolyl)-N′′-(1-isopropyl, 2-diphenylphosphano ethyl)guanidine (H2L3) affords mixtures of the corresponding chlorido compound [(η6-p-cymene)RuCl(H2L3)][SbF6] (3) together with the complexes [(η6-p-cymene)RuCl2(H3L3)][SbF6] (4) and [(η6-p-cymene)Ru(κ3N,N′,P-HL3)][SbF6] (10) which contain phosphano-guanidinium and phosphano-guanidinate ions acting as monodentate and tridentate ligand, respectively. Compounds 1, 2 and mixture of 3/4/10 react with AgSbF6 rendering the cationic aqua-complexes [(η6-p-cymene)Ru(H2L)(OH2)][SbF6]2 (H2L=H2L1 (5), H2L2 (6), H2L3 (7)). These aqua-complexes exhibit a temperature-dependent fluxional process in solution. Experimental NMR studies and DFT theoretical calculations on complex 6 suggest that the process involves the exchange between two rotamers around one of the C−N guanidine bonds. Treatment of 5–7 with NaHCO3 renders the complexes [(η6-p-cymene)Ru(κ3N,N′,N′′-HL1)][SbF6] (8) and [(η6-p-cymene)Ru(κ3N,N′,P-HL)][SbF6] (HL=HL2 (9), HL3 (10)), respectively, in which the HL ligand adopts a fac κ3 coordination mode. The new complexes have been characterized by analytical and spectroscopic means, including the determination of the crystal structures of the compounds 1, 2, 5, 9 and 10, by X-ray diffractometric methods. info:eu-repo/grantAgreement/ES/MICINN/CTQ2017-83421-P info:eu-repo/grantAgreement/ES/MICINN/CTQ2018-095561-BI00 info:eu-repo/grantAgreement/ES/MINECO/RYC-2013-13800 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 2.201 2021 CHEMISTRY, MULTIDISCIPLINARY 122 / 180 = 0.678 2021 Q3 T3 0.595 2021 Biochemistry 2021 Q2 Catalysis 2021 Q2 Physical and Theoretical Chemistry 2021 Q2 Inorganic Chemistry 2021 Q2 Drug Discovery 2021 Q2 3.4 2021 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Viguri, Fernando Universidad de Zaragoza (orcid)0000-0002-6160-3046 Rodríguez, Ricardo Universidad de Zaragoza (orcid)0000-0002-8845-0174 López, José A. Universidad de Zaragoza (orcid)0000-0003-4500-1974 García-Orduña, Pilar (orcid)0000-0002-7063-1292 Lahoz, Fernando J. (orcid)0000-0001-8054-2237 Lamata, Pilar Universidad de Zaragoza (orcid)0000-0001-9071-563X Carmona, Daniel (orcid)0000-0003-4196-5856 2010 760 Universidad de Zaragoza Dpto. Química Inorgánica Área Química Inorgánica 104, 6 (2021), e2100044 [17 pp.] Helv. chim. acta HELVETICA CHIMICA ACTA 0018-019X 1554999 http://zaguan.unizar.es/record/112383/files/texto_completo.pdf Postprint 1966751 http://zaguan.unizar.es/record/112383/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:112383 articulos driver 2023-05-18-14:06:46 ARTICLE