Mixed-Valence Tetrametallic Iridium Chains

Pilar del Río, M. ; Villarroya, B. Eva (Universidad de Zaragoza) ; López, José A. (Universidad de Zaragoza) ; Geer, Ana M. (Universidad de Zaragoza) ; Lahoz, Fernando J. ; Ciriano, Miguel A. ; Tejel, Cristina

Resumen: Neutral [X−{Ir2}−{Ir2}−X] (X=Cl, Br, SCN, I) and dicationic [L−{Ir2}−{Ir2}−L]2+ (L=MeCN, Me2CO) tetrametallic iridium chains made by connecting two dinuclear {Ir2} units ({Ir2}=[Ir2(μ‐OPy)2(CO)4], OPy=2‐pyridonate) by an iridium–iridium bond are described. The complexes exhibit fractional averaged oxidation states of +1.5 and electronic delocalization along the metallic chain. While the axial ligands do not significantly affect the metal–metal bond lengths, the metallic chain has a significant impact on the iridium–L/X bond distances. The complexes show free rotation around the unsupported iridium‐iridium bond in solution, with a low‐energy transition state for the chloride chain. The absorption spectra of these complexes show characteristic bands at 438–504 nm, which can be fine‐tuned by varying the terminal capping ligands.

Idioma: Inglés

DOI: 10.1002/chem.202301438

Año: 2023

Publicado en: Chemistry - A European Journal 29, 52 (2023), e202301438 [9 pp.]
ISSN: 0947-6539

Factor impacto JCR: 3.9 (2023)

Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 80 / 231 = 0.346 (2023) - Q2 - T2

Factor impacto CITESCORE: 7.9 - Organic Chemistry (Q1) - Catalysis (Q2)

Factor impacto SCIMAGO: 1.058 - Chemistry (miscellaneous) (Q1) - Organic Chemistry (Q1) - Catalysis (Q2)

Financiación: info:eu-repo/grantAgreement/ES/AEI/PID2020-119512GB-I00
Financiación: info:eu-repo/grantAgreement/ES/DGA/E50-23R
Financiación: info:eu-repo/grantAgreement/ES/MICINN/IJC-2018-035231-I

Tipo y forma: Article (Published version)

Área (Departamento): Área Química Inorgánica (Dpto. Química Inorgánica)