Monometallic and heterobimetallic ruthenium (II) and palladium (II) complexes based on a pyridine-hydrazone ligand as bifunctional catalysts for ROMP of norbornene and ethylene polymerization

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Federal do Triângulo Mineiro-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Federal de Uberlândia (UFU)-
Autor(es): dc.creatorGois, Patrik Dione de Santana-
Autor(es): dc.creatorMaia, Juliana Iris Pereira-
Autor(es): dc.creatorMasson, Gustavo Henrique Cicero-
Autor(es): dc.creatorMartins, Daniele Maria-
Autor(es): dc.creatorMachado, Antonio Eduardo da Hora-
Autor(es): dc.creatorGoi, Beatriz Eleutério-
Autor(es): dc.creatorMaia, Pedro Ivo da Silva-
Autor(es): dc.creatorCarvalho-Jr, Valdemiro Pereira de-
Data de aceite: dc.date.accessioned2025-08-21T20:28:24Z-
Data de disponibilização: dc.date.available2025-08-21T20:28:24Z-
Data de envio: dc.date.issued2022-05-01-
Data de envio: dc.date.issued2022-05-01-
Data de envio: dc.date.issued2022-01-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1002/aoc.6491-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/233749-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/233749-
Descrição: dc.descriptionThe monometallic complex [Pd(L)(PPh3)] (mono-Pd) was synthesized using a potentially tridentate hydrazone (H2L) and used as precursor to prepare a heterobimetallic ruthenium (II)-palladium (II) complex [Cl2(p-cymene)Ru(μ-L)Pd (PPh3)] (Ru-Pd). Mono-Pd and Ru-Pd were characterized by fourier transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV–Vis), 1H, 13C{1H} and 31P{1H} nuclear magnetic ressonance(NMR) spectroscopy, elemental analysis, cyclic voltammetry, matrix-assisted laser desorption/ionization - time of flight (MALDI-TOF) mass spectrometry, and computational methods. The mono-Pd was additionally studied by single-crystal X-ray diffraction. The complex [RuCl2(p-cymene)(Isoniazid)] (mono-Ru) was also obtained following literature methods aiming a comparison in the catalytic activity. The ring opening metathesis polymerization (ROMP) of norbornene (NBE) using mono-Ru or Ru-Pd as precatalysts in the presence of ethyl diazoacetate (EDA) was evaluated as a function of time (10–60 min) using [NBE]/[EDA]/[Ru] = 5000/28/1 at 50°C. The time increases produced good yields of polyNBE, reaching 38% and 46% for mono-Ru and Ru-Pd, respectively. The polyNBE produced was measured by size-exclusion chromatography (SEC) and reached an order of magnitude of 105 g·mol−1 of Mn, with Ð values ranging from 2.51 to 1.86 for mono-Ru and from 3.50 to 1.66 for Ru-Pd. The catalytic activity of mono-Pd and Ru-Pd on ethylene polymerization was assessed with a range of [Al]/[Pd] molar ratio between 350 and 1750, 30–70°C temperature, 2 to 4 h reaction time, and total reaction volume of 25 and 50 ml. Mono-Pd achieved an activity of 22.80 kg PE (mol Pd)−1 h−1 at 60°C after 4 h using [Al]/[Pd] = 1050, 7 μmol of catalyst in 25 ml of toluene, and 116 psi ethylene. For Ru-Pd, an activity of 20.35 kg PE (mol Pd)−1 h−1 at 60°C after 4 h was obtained using [Al]/[Pd] = 1750, 7 μmol of catalyst in 25 ml of toluene, and 116 psi ethylene. Overall, Ru-Pd showed to be active in both ROMP and ethylene polymerization reactions, being categorized as a bifunctional catalyst.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionFaculdade de Ciências e Tecnologia UNESP – Univ. Estadual Paulista-
Descrição: dc.descriptionDepartamento de Química Universidade Federal do Triângulo Mineiro-
Descrição: dc.descriptionInstituto de Química de São Carlos Universidade de São Paulo-
Descrição: dc.descriptionInstituto de Química Universidade Federal de Uberlândia-
Descrição: dc.descriptionFaculdade de Ciências e Tecnologia UNESP – Univ. Estadual Paulista-
Descrição: dc.descriptionFAPESP: 2018/06340-1-
Descrição: dc.descriptionFAPESP: 2018/19395-9-
Idioma: dc.languageen-
Relação: dc.relationApplied Organometallic Chemistry-
???dc.source???: dc.sourceScopus-
Título: dc.titleMonometallic and heterobimetallic ruthenium (II) and palladium (II) complexes based on a pyridine-hydrazone ligand as bifunctional catalysts for ROMP of norbornene and ethylene polymerization-
Tipo de arquivo: dc.typelivro digital-
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