Metal complexes in catalytic olefin transformations. 2. Structure of phosphine ligands attached to silica; Ni-catalysts for ethylene dimerization

Autor:	A. Yu. Belyankin, A. V. Ignatenko, G. V. Lisichkin, V. S. Bogdanov, Alexander Ivanov, A. Yu. Olenin, D. B. Furman, V. I. Bragin
Rok vydání:	1989
Předmět:	chemistry.chemical_compound Olefin fiber Ethylene Diphenylphosphine Chemistry Ligand Polymer chemistry Chemical modification Organic chemistry General Chemistry Selectivity Phosphine Catalysis
Zdroj:	Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 38:2447-2451
ISSN:	1573-9171 0568-5230
DOI:	10.1007/bf00962421
Popis:	γ-Bis(diphenylphosphine)aminopropyltriethoxysilane is synthesized and studied by IR and1H,13C, and31P1H NMR spectroscopies for the first time. Chemical modification of silica with (EtO)3Si(CH2)3N(PPh2)2 gives the support (γ-DPAMPS) containing identical N(PPh2)2 ligands on its surface. Subsequent treatment of the support with (EtO)3Si(CH2)3NH2 and ClPPh2 gives a silica surface containing two types of attached ligands, NH2 and N(PPh2)2, in the ratio ∼1∶1. The heterogenized complexes Ni-HMC, prepared by ligand exchange between Ni(PPh3)n (n=3, 4) and γ-DPAMPS, in combination with Et2AlCl exhibit activity and selectivity for ethylene dimerization.
Databáze:	OpenAIRE
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