FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2057251015> ?p ?o ?g. }

• W2057251015 endingPage "4469" @default.
• W2057251015 startingPage "4465" @default.
• W2057251015 abstract "The photochemistry of several para-substituted aryl azides was studied by laser flash photolysis (LFP) techniques in pentane. Para F, Cl, Br, I, CH3, CF3, COCH3, OCH3, and NO2 substituted aryl azides were studied. LFP of aryl azides generates singlet aryl nitrenes which were detected in absorption with maxima between 300 and 365 nm in pentane. The nitrene decay can be fit to an exponential function and analyzed to yield observed rate constant, kobs, which was measured as a function of temperature. The value of kobs = kR + kISC where kR and kISC are the rate constants of nitrene rearrangement to azirine intermediates and intersystem crossing to the lower energy triplet states, respectively. Values of kobs decrease as the temperature is reduced and reach a limiting value attributed to kISC. Assuming that kISC is temperature independent allows values of kR to be deduced along with the Arrhenius parameters to cyclization for para CH3, CF3, COCH3, F, Cl, and Br singlet phenyl nitrenes. The Arrhenius parameters to rearrangement closely resemble those of parent singlet phenyl nitrene with the exception of the para bromo compound. For para I and OCH3, kISC is large and prevents measurement of kR. The increased rate of intersystem crossing in these two singlet nitrenes is due to heavy-atom and to electron-donation effects, respectively. No transient absorptions were detected upon LFP of p-nitrophenyl azide." @default.
• W2057251015 created "2016-06-24" @default.
• W2057251015 creator A5058902592 @default.
• W2057251015 creator A5072466849 @default.
• W2057251015 creator A5091350326 @default.
• W2057251015 date "1999-05-20" @default.
• W2057251015 modified "2023-10-16" @default.
• W2057251015 title "A Laser Flash Photolysis Study of Some Simple Para-Substituted Derivatives of Singlet Phenyl Nitrene" @default.
• W2057251015 cites W1968461862 @default.
• W2057251015 cites W1977629594 @default.
• W2057251015 cites W1980112249 @default.
• W2057251015 cites W1983170208 @default.
• W2057251015 cites W1984975657 @default.
• W2057251015 cites W2009645593 @default.
• W2057251015 cites W2010110911 @default.
• W2057251015 cites W2012857741 @default.
• W2057251015 cites W2024225612 @default.
• W2057251015 cites W2032672063 @default.
• W2057251015 cites W2033706909 @default.
• W2057251015 cites W2034787921 @default.
• W2057251015 cites W2035185191 @default.
• W2057251015 cites W2035496719 @default.
• W2057251015 cites W2042657151 @default.
• W2057251015 cites W2076431537 @default.
• W2057251015 cites W2083246938 @default.
• W2057251015 cites W2084720076 @default.
• W2057251015 cites W2105050546 @default.
• W2057251015 cites W2168928118 @default.
• W2057251015 cites W2950007144 @default.
• W2057251015 cites W2951512787 @default.
• W2057251015 cites W2952647045 @default.
• W2057251015 doi "https://doi.org/10.1021/jp990004u" @default.
• W2057251015 hasPublicationYear "1999" @default.
• W2057251015 type Work @default.
• W2057251015 sameAs 2057251015 @default.
• W2057251015 citedByCount "57" @default.
• W2057251015 countsByYear W20572510152012 @default.
• W2057251015 countsByYear W20572510152013 @default.
• W2057251015 countsByYear W20572510152014 @default.
• W2057251015 countsByYear W20572510152015 @default.
• W2057251015 countsByYear W20572510152016 @default.
• W2057251015 countsByYear W20572510152017 @default.
• W2057251015 countsByYear W20572510152018 @default.
• W2057251015 countsByYear W20572510152019 @default.
• W2057251015 countsByYear W20572510152020 @default.
• W2057251015 countsByYear W20572510152021 @default.
• W2057251015 countsByYear W20572510152022 @default.
• W2057251015 countsByYear W20572510152023 @default.
• W2057251015 crossrefType "journal-article" @default.
• W2057251015 hasAuthorship W2057251015A5058902592 @default.
• W2057251015 hasAuthorship W2057251015A5072466849 @default.
• W2057251015 hasAuthorship W2057251015A5091350326 @default.
• W2057251015 hasConcept C121332964 @default.
• W2057251015 hasConcept C13472781 @default.
• W2057251015 hasConcept C147789679 @default.
• W2057251015 hasConcept C148898269 @default.
• W2057251015 hasConcept C161522054 @default.
• W2057251015 hasConcept C161790260 @default.
• W2057251015 hasConcept C178790620 @default.
• W2057251015 hasConcept C181500209 @default.
• W2057251015 hasConcept C184779094 @default.
• W2057251015 hasConcept C185592680 @default.
• W2057251015 hasConcept C2780263894 @default.
• W2057251015 hasConcept C2781076698 @default.
• W2057251015 hasConcept C32909587 @default.
• W2057251015 hasConcept C33062035 @default.
• W2057251015 hasConcept C38489247 @default.
• W2057251015 hasConcept C62520636 @default.
• W2057251015 hasConcept C73978554 @default.
• W2057251015 hasConcept C75473681 @default.
• W2057251015 hasConcept C76766466 @default.
• W2057251015 hasConcept C86183883 @default.
• W2057251015 hasConcept C93391505 @default.
• W2057251015 hasConcept C95121573 @default.
• W2057251015 hasConceptScore W2057251015C121332964 @default.
• W2057251015 hasConceptScore W2057251015C13472781 @default.
• W2057251015 hasConceptScore W2057251015C147789679 @default.
• W2057251015 hasConceptScore W2057251015C148898269 @default.
• W2057251015 hasConceptScore W2057251015C161522054 @default.
• W2057251015 hasConceptScore W2057251015C161790260 @default.
• W2057251015 hasConceptScore W2057251015C178790620 @default.
• W2057251015 hasConceptScore W2057251015C181500209 @default.
• W2057251015 hasConceptScore W2057251015C184779094 @default.
• W2057251015 hasConceptScore W2057251015C185592680 @default.
• W2057251015 hasConceptScore W2057251015C2780263894 @default.
• W2057251015 hasConceptScore W2057251015C2781076698 @default.
• W2057251015 hasConceptScore W2057251015C32909587 @default.
• W2057251015 hasConceptScore W2057251015C33062035 @default.
• W2057251015 hasConceptScore W2057251015C38489247 @default.
• W2057251015 hasConceptScore W2057251015C62520636 @default.
• W2057251015 hasConceptScore W2057251015C73978554 @default.
• W2057251015 hasConceptScore W2057251015C75473681 @default.
• W2057251015 hasConceptScore W2057251015C76766466 @default.
• W2057251015 hasConceptScore W2057251015C86183883 @default.
• W2057251015 hasConceptScore W2057251015C93391505 @default.
• W2057251015 hasConceptScore W2057251015C95121573 @default.
• W2057251015 hasIssue "23" @default.
• W2057251015 hasLocation W20572510151 @default.

• next