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A Kumada Coupling Catalyst, [Ni{(Ph2P)2N(CH2)3Si(OCH3)3-P,P }Cl2], Bearing a Ligand for Direct Immobilization Onto Siliceous Mesoporous Molecular Sieves
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SYSNO ASEP 0444673 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název A Kumada Coupling Catalyst, [Ni{(Ph2P)2N(CH2)3Si(OCH3)3-P,P }Cl2], Bearing a Ligand for Direct Immobilization Onto Siliceous Mesoporous Molecular Sieves Tvůrce(i) Stamatopoulos, I. (GR)
Giannitsios, D. (GR)
Psycharis, V. (GR)
Raptopoulou, C. P. (GR)
Balcar, Hynek (UFCH-W) RID, ORCID
Zukal, Arnošt (UFCH-W) RID
Svoboda, J. (CZ)
Kyritsis, P. (GR)
Vohlídal, J. (CZ)Zdroj.dok. European Journal of Inorganic Chemistry. - : Wiley - ISSN 1434-1948
Roč. 2015, č. 18 (2015), s. 3038-3044Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova homogenous catalysis ; heterogeneous catalysis ; cross coupling Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP GAP108/12/1143 GA ČR - Grantová agentura ČR Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000356599600016 EID SCOPUS 84930396479 DOI 10.1002/ejic.201500447 Anotace The ligand-exchange reaction between [Ni(PPh3)2Cl2] and (Ph2P)2N(CH2)3Si(OCH3)3 afforded the novel NiII complex [Ni{(Ph2P)2N(CH2)3Si(OCH3)3-P,P′}Cl2] (1) in which the square-planar NiP2Cl2 coordination sphere contains a four-membered Ni–P–N–P ring. Comparison of the structure of 1 and related NiII square-planar or Ni0 tetrahedral complexes containing similar P–N–P ligands shows that the magnitude of the P–Ni–P angle is controlled by the presence of the Ni–P–N–P ring, irrespective of the geometry of the nickel coordination sphere. Direct anchoring of 1 onto SBA-15 molecular sieves through the trimethoxysilyl end-group of the ligand afforded heterogeneous catalyst 1/SBA-15. Both 1 and 1/SBA-15 catalyze Kumada cross-coupling reactions, exhibiting similar activity and a slightly higher product selectivity than the [Ni{Ph2P(CH2)3PPh2-P,P′}Cl2] and [Ni{(Ph2P)2N-(S)-CHMePh-P,P′}X2] (X = Cl, Br) complexes described in the literature. The Grignard reagent employed is likely to induce leaching of the catalyst, which retains its activity in solution. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2016
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