Synthesis and characterization of orthopalladated complexes containing tridentate C, N, O-oxazolones

Dalmau, D. (Universidad de Zaragoza) ; Jiménez, A.I. ; Urriolabeitia, E.P.

Resumen: The (Z)-4-aryliden-2-(2-acetoxyphenyl)-5(4H)oxazolones 1a-1c react with H2SO4 to give the corresponding (Z)-4-aryliden-2-(2-hydroxyphenyl)-5(4H)oxazolones 2a-2c.The molecular structures of 1c and 2a have been determined by X-ray diffraction methods, and show planar skeletons. Oxazolones 2a-2c are potential C, N, O-tridentate ligands towards transition metals, and their molecular design obeys to the search of a rigid environment around the metal. The reaction of Pd(OAc)2 with oxazolones 2a-2c (1:1 M ratio) in CF3CO2H or NCMe as solvents results in the synthesis of diverse complexes (3–7). As a function of the reaction conditions, two different bonding modes have been characterized: N, O-chelate in the dinuclear complexes Pd(¿2-N, O-2b, c)(µ -O2CCF3)]2 (3b, c), as a result of the N-coordination and deprotonation of the hydroxy group; and C, N, O-tridentate in mononuclear complexes Pd(¿ 3-C, N, O-2a, b)(L)] (L = CF3CO2H 4a, b; dmso-d6 5a, b; NCMe 6b; pyridine 7b), obtained after N-bonding, OH deprotonation and C–H bond activation. All complexes have been fully characterized by HRMS and NMR methods, showing the high stability of the C, N, O-tridentate bonding mode.

Idioma: Inglés

DOI: 10.1016/j.poly.2022.115904

Año: 2022

Publicado en: POLYHEDRON 222 (2022), 115904 [8 pp.]
ISSN: 0277-5387

Factor impacto JCR: 2.6 (2022)

Categ. JCR: CRYSTALLOGRAPHY rank: 10 / 26 = 0.385 (2022) - Q2 - T2
Categ. JCR: CHEMISTRY, INORGANIC & NUCLEAR rank: 20 / 42 = 0.476 (2022) - Q2 - T2

Factor impacto CITESCORE: 5.4 - Chemistry (Q2) - Materials Science (Q2)

Factor impacto SCIMAGO: 0.4 - Materials Chemistry (Q2) - Physical and Theoretical Chemistry (Q3) - Inorganic Chemistry (Q3)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E19-20R
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2019-106394GB-I00

Tipo y forma: Artículo (Versión definitiva)

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