FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1982378977> ?p ?o ?g. }

• W1982378977 endingPage "2143" @default.
• W1982378977 startingPage "2143" @default.
• W1982378977 abstract "For the rhodium-catalysed hydroformylation of higher alkenes the novel amphiphilic diphosphines 2,2′-bis[phenyl(3-pyridyl)phosphinomethyl]-1,1′-biphenyl (L1), 2,2′-bis(diphenylphosphinomethyl)-3,3′-bipyridine (L2), 2,2′-bis[phenyl(3-pyridyl)phosphinomethyl]-3,3′-bipyridine (L3) and 2,2′-bis{[4-(diethylaminomethyl)-phenyl]phenylphosphinomethyl}-1,1′-biphenyl (L4) have been synthesised. With oct-1-ene (80 °C, 20 bar CO–H2, toluene), high normal: branded ratios (up to 51 : 1) were found with 6–8% of isomerised octenes. The diphosphines L1–L3 gave rhodium catalysts up to twice as active as those derived from 2,2′-bis(diphenylphosphinomethyl)-1,1′-biphenyl (bisbi). The rate of hydroformylation using L1–L4 was first order and approximately first order respectively in the rhodium and oct-1-ene concentration; the order in CO pressure was negative and that in H2 pressure slightly negative. For L1 the influence of the L : Rh ratio, temperature and substrate were investigated. Phosphorus-31 and 1H NMR studies showed that the diphosphines (L–L) form [RhH(CO)(PPh3)(L–L)] and [RhH(CO)2(L–L)] complexes, analogously to bisbi. The formation of P–N chelates was not observed. The pH-dependent distribution characteristics of the free diphosphines have been determined; L3 and L4 were quantitatively extracted from an Et2O solution into a H2SO4 solution of pH 2. When L4 was used, rhodium and the excess of L4 were extracted into an acidic aqueous phase at pH 5, allowing separation of the aldehydes, and re-extracted into fresh toluene after neutralisation of the aqueous phase by NaHCO3. Inductively coupled plasma atomic emission spectroscopy established a rhodium recovery up to 92%. Pressurising the recovered rhodium and excess of phosphine to 20 bar CO–H2 at 80 °C resulted in regeneration of the original catalytically active species. A retention of catalytic activity of 72% was achieved. Diphosphines L1–L3 proved inappropriate for rhodium-recycling experiments. Extraction into an acidic aqueous phase was effective, but neutralisation of the acidic phase resulted in the formation of rhodium species which cannot be extracted from the aqueous layer." @default.
• W1982378977 created "2016-06-24" @default.
• W1982378977 creator A5005138503 @default.
• W1982378977 creator A5025562483 @default.
• W1982378977 creator A5055735130 @default.
• W1982378977 creator A5070975248 @default.
• W1982378977 creator A5085965496 @default.
• W1982378977 date "1996-01-01" @default.
• W1982378977 modified "2023-10-09" @default.
• W1982378977 title "Novel amphiphilic diphosphines: synthesis, rhodium complexes, use in hydroformylation and rhodium recycling" @default.
• W1982378977 cites W1973228821 @default.
• W1982378977 cites W1984516476 @default.
• W1982378977 cites W1986372915 @default.
• W1982378977 cites W1988707811 @default.
• W1982378977 cites W1989549118 @default.
• W1982378977 cites W1990587942 @default.
• W1982378977 cites W2000375268 @default.
• W1982378977 cites W2002243118 @default.
• W1982378977 cites W2004579549 @default.
• W1982378977 cites W2006047192 @default.
• W1982378977 cites W2007653510 @default.
• W1982378977 cites W2010676355 @default.
• W1982378977 cites W2027146579 @default.
• W1982378977 cites W2028351865 @default.
• W1982378977 cites W2036611026 @default.
• W1982378977 cites W2045783796 @default.
• W1982378977 cites W2046098451 @default.
• W1982378977 cites W2046753897 @default.
• W1982378977 cites W2055112283 @default.
• W1982378977 cites W2080988955 @default.
• W1982378977 cites W2084039461 @default.
• W1982378977 cites W2087947900 @default.
• W1982378977 cites W2089012790 @default.
• W1982378977 cites W2091767276 @default.
• W1982378977 cites W2107303968 @default.
• W1982378977 cites W2114411401 @default.
• W1982378977 cites W2125993181 @default.
• W1982378977 cites W2164271740 @default.
• W1982378977 cites W2949840825 @default.
• W1982378977 cites W2950892427 @default.
• W1982378977 cites W2951347795 @default.
• W1982378977 doi "https://doi.org/10.1039/dt9960002143" @default.
• W1982378977 hasPublicationYear "1996" @default.
• W1982378977 type Work @default.
• W1982378977 sameAs 1982378977 @default.
• W1982378977 citedByCount "23" @default.
• W1982378977 countsByYear W19823789772020 @default.
• W1982378977 countsByYear W19823789772022 @default.
• W1982378977 crossrefType "journal-article" @default.
• W1982378977 hasAuthorship W1982378977A5005138503 @default.
• W1982378977 hasAuthorship W1982378977A5025562483 @default.
• W1982378977 hasAuthorship W1982378977A5055735130 @default.
• W1982378977 hasAuthorship W1982378977A5070975248 @default.
• W1982378977 hasAuthorship W1982378977A5085965496 @default.
• W1982378977 hasConcept C100805817 @default.
• W1982378977 hasConcept C155647269 @default.
• W1982378977 hasConcept C161790260 @default.
• W1982378977 hasConcept C178790620 @default.
• W1982378977 hasConcept C185592680 @default.
• W1982378977 hasConcept C2778142098 @default.
• W1982378977 hasConcept C2778818089 @default.
• W1982378977 hasConcept C521398313 @default.
• W1982378977 hasConceptScore W1982378977C100805817 @default.
• W1982378977 hasConceptScore W1982378977C155647269 @default.
• W1982378977 hasConceptScore W1982378977C161790260 @default.
• W1982378977 hasConceptScore W1982378977C178790620 @default.
• W1982378977 hasConceptScore W1982378977C185592680 @default.
• W1982378977 hasConceptScore W1982378977C2778142098 @default.
• W1982378977 hasConceptScore W1982378977C2778818089 @default.
• W1982378977 hasConceptScore W1982378977C521398313 @default.
• W1982378977 hasIssue "10" @default.
• W1982378977 hasLocation W19823789771 @default.
• W1982378977 hasOpenAccess W1982378977 @default.
• W1982378977 hasPrimaryLocation W19823789771 @default.
• W1982378977 hasRelatedWork W2002304486 @default.
• W1982378977 hasRelatedWork W2007477592 @default.
• W1982378977 hasRelatedWork W2021096835 @default.
• W1982378977 hasRelatedWork W2036275455 @default.
• W1982378977 hasRelatedWork W2045874157 @default.
• W1982378977 hasRelatedWork W2100233294 @default.
• W1982378977 hasRelatedWork W2123899310 @default.
• W1982378977 hasRelatedWork W2190558532 @default.
• W1982378977 hasRelatedWork W2324914501 @default.
• W1982378977 hasRelatedWork W2465545831 @default.
• W1982378977 isParatext "false" @default.
• W1982378977 isRetracted "false" @default.
• W1982378977 magId "1982378977" @default.
• W1982378977 workType "article" @default.