FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3025957041> ?p ?o ?g. }

• W3025957041 abstract "A new heme-peroxo-copper complex structural type with mu-eta2:eta2 peroxo ligation has been generated utilizing a heterobinucleating ligand with bis(2-(2-pyridyl)ethyl)amine tridentate chelate for copper. Oxygenation of [(2L)FeIICuI]+ (1) at -80 degrees C in CH2Cl2/6%EtCN, 1 (lambdamax, 426, 530 nm) produces [(2L)FeIII-(O22-)-CuII)]+ (3) (lambdamax, 419, 488, 544, 575 nm). Stopped-flow kinetic/spectroscopic probing reveals that a superoxo complex, [(2L)FeIII-(O2-)...CuI(NCEt)]+ (2) (lambdamax = 544 nm), initially forms, k1 = 5.23 +/- 0.09 x 104 M-1 s-1 (-105 degrees C). Subsequent intramolecular reaction of the copper(I) ion in 2 occurs with k2 = 2.74 +/- 0.04 x 101 s-1 (-105 degrees C), producing 3. Resonance Raman spectroscopy (rR) confirms the peroxo assignment for 3; nu(O-O) = 747 cm-1 (Delta(18O2) = -40 cm-1). In an 16O-18O mixed isotope experiment a single band is observed at 730 cm-1. The low nu(O-O) value and the absence of a splitting of the 730 cm-1 band are indicative of a symmetrical binding of the peroxide group in a side-on mu-eta2:eta2 geometry. This conclusion is supported by X-ray absorption spectroscopy on 3. Copper K-edge EXAFS indicates a five-coordinate metal center: 2 N, 2.028(7) A; 2 O, 1.898(7) A; 1 N, 2.171(12) A. An outer-sphere Fe scatterer is found at 3.62(1) A. The iron center K-edge EXAFS fits to either a five- or six-coordinate metal center: 4 N(pyrrole), approximately 2.1 A; 1,2 O, approximately 1.9 A. A preedge feature (Fe(1s) --> Fe(3d) transition) at 7113.2(2) eV resembles that obtained for a eta2-peroxo ferric heme complex, being weaker and at approximately 1.5 eV lower energy than those found in five-coordinate (P)FeIII-X (in C4v symmetry) complexes. Arguments based on rR properties of relevant peroxo compounds also effectively point to the copper(II) ion in 3 as being side-on bound, leading to the very low O-O stretching frequency observed in comparison to those of heme-peroxo species or heme-peroxo-copper complexes with a tetradentate copper chelate. These investigations derive from interest in establishing relevant and/or fundamental O2 chemistry at heme-copper centers, in relation to heme-copper oxidase active-site chemistry." @default.
• W3025957041 created "2020-05-21" @default.
• W3025957041 creator A5006801708 @default.
• W3025957041 creator A5050020289 @default.
• W3025957041 creator A5051465614 @default.
• W3025957041 creator A5052912332 @default.
• W3025957041 creator A5059864745 @default.
• W3025957041 creator A5079246484 @default.
• W3025957041 creator A5084521304 @default.
• W3025957041 creator A5088157584 @default.
• W3025957041 date "2004-01-01" @default.
• W3025957041 modified "2023-09-23" @default.
• W3025957041 title "HEME/CU/O2 REACTIVITY: CHANGE IN FEIII-(O2 2-)-CUII UNIT PEROXO BINDING GEOMETRY EFFECTED BY TRIDENTATE COPPER CHELATION." @default.
• W3025957041 hasPublicationYear "2004" @default.
• W3025957041 type Work @default.
• W3025957041 sameAs 3025957041 @default.
• W3025957041 citedByCount "0" @default.
• W3025957041 crossrefType "journal-article" @default.
• W3025957041 hasAuthorship W3025957041A5006801708 @default.
• W3025957041 hasAuthorship W3025957041A5050020289 @default.
• W3025957041 hasAuthorship W3025957041A5051465614 @default.
• W3025957041 hasAuthorship W3025957041A5052912332 @default.
• W3025957041 hasAuthorship W3025957041A5059864745 @default.
• W3025957041 hasAuthorship W3025957041A5079246484 @default.
• W3025957041 hasAuthorship W3025957041A5084521304 @default.
• W3025957041 hasAuthorship W3025957041A5088157584 @default.
• W3025957041 hasConcept C107861141 @default.
• W3025957041 hasConcept C11111787 @default.
• W3025957041 hasConcept C115624301 @default.
• W3025957041 hasConcept C116569031 @default.
• W3025957041 hasConcept C119824511 @default.
• W3025957041 hasConcept C121332964 @default.
• W3025957041 hasConcept C125287762 @default.
• W3025957041 hasConcept C131779359 @default.
• W3025957041 hasConcept C142724271 @default.
• W3025957041 hasConcept C159985019 @default.
• W3025957041 hasConcept C170493617 @default.
• W3025957041 hasConcept C178790620 @default.
• W3025957041 hasConcept C179104552 @default.
• W3025957041 hasConcept C185592680 @default.
• W3025957041 hasConcept C192562407 @default.
• W3025957041 hasConcept C197404232 @default.
• W3025957041 hasConcept C204787440 @default.
• W3025957041 hasConcept C2776910235 @default.
• W3025957041 hasConcept C32891209 @default.
• W3025957041 hasConcept C544153396 @default.
• W3025957041 hasConcept C544778455 @default.
• W3025957041 hasConcept C55493867 @default.
• W3025957041 hasConcept C62520636 @default.
• W3025957041 hasConcept C71240020 @default.
• W3025957041 hasConcept C71924100 @default.
• W3025957041 hasConcept C75079739 @default.
• W3025957041 hasConcept C8010536 @default.
• W3025957041 hasConceptScore W3025957041C107861141 @default.
• W3025957041 hasConceptScore W3025957041C11111787 @default.
• W3025957041 hasConceptScore W3025957041C115624301 @default.
• W3025957041 hasConceptScore W3025957041C116569031 @default.
• W3025957041 hasConceptScore W3025957041C119824511 @default.
• W3025957041 hasConceptScore W3025957041C121332964 @default.
• W3025957041 hasConceptScore W3025957041C125287762 @default.
• W3025957041 hasConceptScore W3025957041C131779359 @default.
• W3025957041 hasConceptScore W3025957041C142724271 @default.
• W3025957041 hasConceptScore W3025957041C159985019 @default.
• W3025957041 hasConceptScore W3025957041C170493617 @default.
• W3025957041 hasConceptScore W3025957041C178790620 @default.
• W3025957041 hasConceptScore W3025957041C179104552 @default.
• W3025957041 hasConceptScore W3025957041C185592680 @default.
• W3025957041 hasConceptScore W3025957041C192562407 @default.
• W3025957041 hasConceptScore W3025957041C197404232 @default.
• W3025957041 hasConceptScore W3025957041C204787440 @default.
• W3025957041 hasConceptScore W3025957041C2776910235 @default.
• W3025957041 hasConceptScore W3025957041C32891209 @default.
• W3025957041 hasConceptScore W3025957041C544153396 @default.
• W3025957041 hasConceptScore W3025957041C544778455 @default.
• W3025957041 hasConceptScore W3025957041C55493867 @default.
• W3025957041 hasConceptScore W3025957041C62520636 @default.
• W3025957041 hasConceptScore W3025957041C71240020 @default.
• W3025957041 hasConceptScore W3025957041C71924100 @default.
• W3025957041 hasConceptScore W3025957041C75079739 @default.
• W3025957041 hasConceptScore W3025957041C8010536 @default.
• W3025957041 hasIssue "4" @default.
• W3025957041 hasLocation W30259570411 @default.
• W3025957041 hasOpenAccess W3025957041 @default.
• W3025957041 hasPrimaryLocation W30259570411 @default.
• W3025957041 hasRelatedWork W1576888179 @default.
• W3025957041 hasRelatedWork W1969556649 @default.
• W3025957041 hasRelatedWork W1974013397 @default.
• W3025957041 hasRelatedWork W1974762917 @default.
• W3025957041 hasRelatedWork W1978988872 @default.
• W3025957041 hasRelatedWork W2024033760 @default.
• W3025957041 hasRelatedWork W2032362762 @default.
• W3025957041 hasRelatedWork W2033699658 @default.
• W3025957041 hasRelatedWork W2042528652 @default.
• W3025957041 hasRelatedWork W2060484145 @default.
• W3025957041 hasRelatedWork W2060588342 @default.
• W3025957041 hasRelatedWork W2068310165 @default.
• W3025957041 hasRelatedWork W2073482842 @default.
• W3025957041 hasRelatedWork W2094441071 @default.
• W3025957041 hasRelatedWork W2109460649 @default.
• W3025957041 hasRelatedWork W2154668724 @default.

• next