FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1976549599> ?p ?o ?g. }

• W1976549599 endingPage "618" @default.
• W1976549599 startingPage "607" @default.
• W1976549599 abstract "A series of binuclear, hydroxyl-bridged copper(II) complexes 1-10 with the general formula [Cu 2 (LR 2 D 2 )(OH)](ClO 4 ) 2 was prepared and characterized. The mono basic, five- or sevendentate ligands HLR 2 D 2 were obtained either by reduction of the Schiff bases derived from the condensation of 2,6-diformyl-4-methylphenol and the amines H 2 N – D (complex 1: D = -(CH 2 ) 2 -NH 2 ; 2: -(CH 2 ) 2 -NMe 2 ; 3: -(CH 2 ) 2 -NEt 2 ; 4: -(CH 2 ) 3 -NEt 2 ; 5: -(CH 2 ) 2 -4-imidazolyl; 6: -CH 2 -2-pyridyl; 7: -(CH 2 ) 2 -2-pyridyl) or by reacting 2,6-di-(chloromethyl)-4-methylphenol with 2-[(2-methylamino)ethyl]pyridine (complex 8), Ν,Ν,N′,N′-tetraethyldiethylenetriamine (complex 9) or bis[2-(2-pyridyl)ethyl]amine (complex 10) under HC1 elimination. The UV/VIS spectra of complexes 1-8 with two four-coordinate copper centers and of 9 and 10 with two five-coordinate copper centers are discussed. An X-ray structure analysis of complex 6 (= [Cu 2 (LR 2 D 2 )(OH)](ClO 4 ) 2 with R = H and D = -CH 2 -2-pyridyl) was carried out. 6 crystallizes in the orthorhombic space group Pbca and the two copper centers have practically co-planar, doubly O-bridged cis-N 2 O 2 coordination geometries with one perchlorate anion being weakly coordinated to each copper. Stopped-flow spectrophotometry was used to study the kinetics of copper removal from [Cu 2 (LR 2 D 2 )(OH)] 2+ with EDTA in the pH range 8.5-6.6 at 20 °C and I = 0.2 M (NaClO 4 ). The reaction is first-order in both complex and EDTA, the rate law being: rate = k[complex][EDTA] total . At pH 8.0 second-order rate constants k range from 40.3 x 10 3 M -1 s -1 (complex 6) to 3.72x 10 -2 M -1 s -1 (complex 9). It follows from the pH dependence of k that both species H 2 EDTA 2- and HEDTA 3- react independently with [Cu 2 (LR 2 D 2 )(OH)] 2 +, the reactivity of H 2 EDTA 2- being considerably greater than that of HEDTA 3- . The experimental facts support the operation of an associative (A) mechanism with the removal of the first copper being rate-controlling. The kinetic effects of the donor group D and substituent R are attributed to steric and/or electronic interactions." @default.
• W1976549599 created "2016-06-24" @default.
• W1976549599 creator A5020708040 @default.
• W1976549599 creator A5049874426 @default.
• W1976549599 creator A5061448825 @default.
• W1976549599 date "1990-05-01" @default.
• W1976549599 modified "2023-10-18" @default.
• W1976549599 title "Kinetics and Mechanism of Ligand Substitution in Binuclear Copper(II) Complexes as Model Compounds for Hemocyanin" @default.
• W1976549599 doi "https://doi.org/10.1515/znb-1990-0507" @default.
• W1976549599 hasPublicationYear "1990" @default.
• W1976549599 type Work @default.
• W1976549599 sameAs 1976549599 @default.
• W1976549599 citedByCount "10" @default.
• W1976549599 countsByYear W19765495992014 @default.
• W1976549599 countsByYear W19765495992015 @default.
• W1976549599 countsByYear W19765495992019 @default.
• W1976549599 crossrefType "journal-article" @default.
• W1976549599 hasAuthorship W1976549599A5020708040 @default.
• W1976549599 hasAuthorship W1976549599A5049874426 @default.
• W1976549599 hasAuthorship W1976549599A5061448825 @default.
• W1976549599 hasBestOaLocation W19765495991 @default.
• W1976549599 hasConcept C115624301 @default.
• W1976549599 hasConcept C116569031 @default.
• W1976549599 hasConcept C131779359 @default.
• W1976549599 hasConcept C145148216 @default.
• W1976549599 hasConcept C155647269 @default.
• W1976549599 hasConcept C170493617 @default.
• W1976549599 hasConcept C178790620 @default.
• W1976549599 hasConcept C185592680 @default.
• W1976549599 hasConcept C2779485729 @default.
• W1976549599 hasConcept C2780709120 @default.
• W1976549599 hasConcept C37243968 @default.
• W1976549599 hasConcept C544778455 @default.
• W1976549599 hasConcept C55493867 @default.
• W1976549599 hasConcept C71240020 @default.
• W1976549599 hasConcept C8010536 @default.
• W1976549599 hasConceptScore W1976549599C115624301 @default.
• W1976549599 hasConceptScore W1976549599C116569031 @default.
• W1976549599 hasConceptScore W1976549599C131779359 @default.
• W1976549599 hasConceptScore W1976549599C145148216 @default.
• W1976549599 hasConceptScore W1976549599C155647269 @default.
• W1976549599 hasConceptScore W1976549599C170493617 @default.
• W1976549599 hasConceptScore W1976549599C178790620 @default.
• W1976549599 hasConceptScore W1976549599C185592680 @default.
• W1976549599 hasConceptScore W1976549599C2779485729 @default.
• W1976549599 hasConceptScore W1976549599C2780709120 @default.
• W1976549599 hasConceptScore W1976549599C37243968 @default.
• W1976549599 hasConceptScore W1976549599C544778455 @default.
• W1976549599 hasConceptScore W1976549599C55493867 @default.
• W1976549599 hasConceptScore W1976549599C71240020 @default.
• W1976549599 hasConceptScore W1976549599C8010536 @default.
• W1976549599 hasIssue "5" @default.
• W1976549599 hasLocation W19765495991 @default.
• W1976549599 hasOpenAccess W1976549599 @default.
• W1976549599 hasPrimaryLocation W19765495991 @default.
• W1976549599 hasRelatedWork W1976460392 @default.
• W1976549599 hasRelatedWork W2003096552 @default.
• W1976549599 hasRelatedWork W2016392538 @default.
• W1976549599 hasRelatedWork W2059656641 @default.
• W1976549599 hasRelatedWork W2064126951 @default.
• W1976549599 hasRelatedWork W2083569809 @default.
• W1976549599 hasRelatedWork W2085190287 @default.
• W1976549599 hasRelatedWork W2093132841 @default.
• W1976549599 hasRelatedWork W2096155790 @default.
• W1976549599 hasRelatedWork W2951149970 @default.
• W1976549599 hasVolume "45" @default.
• W1976549599 isParatext "false" @default.
• W1976549599 isRetracted "false" @default.
• W1976549599 magId "1976549599" @default.
• W1976549599 workType "article" @default.