FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2012577527> ?p ?o ?g. }

• W2012577527 endingPage "1468" @default.
• W2012577527 startingPage "1455" @default.
• W2012577527 abstract "Electron spin resonance spectra have been obtained for the cation radicals of dihydropyrazine and its methyl-substituted derivatives, and of dihydroquinoxaline, 2,3-dimethyldihydroquinoxaline, dihydrophenazine, and N,N′-dihydro-4,4′-dipyridyl. It was found that the parameter which determines the effect on 14N splittings of the spin density on an adjacent carbon atom has the value QCNN=2.62 G. This result was obtained without making any assumptions about the magnitudes of the sigma—pi parameters and without using valence-theory calculations of pi-electron wavefunctions. The positive sign for QCNN is opposite to that expected from the analogous parameters QCHH and QC CC. The small value of QCNN, and the approximate constancy of the ratio (sum of the spin densities on atoms adjacent to the nitrogen atom) to the (spin density on the nitrogen atom) in most of the compounds for which data are available, makes it possible to represent the nitrogen splittings by the expression aN=—0.940 aNHH, where aNHH is the NH—proton splitting. In some radicals with a large adjacent spin density, however, QCNN may make a significant contribution to the nitrogen splitting. Values of the NH—proton parameter QNHH, and of the C–CH3 parameter QMeH, were obtained as a function of an assumed value of the parameter QCHH for CH protons. With QCHH=—23.7 G, it was found that QNHH=—33.7 G and QMeH=18.4 G. The latter value is considerably smaller than usually assumed for methyl-proton splittings. Molecular orbital calculations for the methyl-substituted pyrazines, as well as for the other cations studied, were in good agreement with experiment." @default.
• W2012577527 created "2016-06-24" @default.
• W2012577527 creator A5037286235 @default.
• W2012577527 creator A5088883764 @default.
• W2012577527 date "1964-09-01" @default.
• W2012577527 modified "2023-09-27" @default.
• W2012577527 title "Electron Spin Resonance Spectra of Methyl-Substituted Dihydropyrazine Cations and Related Radicals" @default.
• W2012577527 cites W1968177488 @default.
• W2012577527 cites W1974661232 @default.
• W2012577527 cites W1975033360 @default.
• W2012577527 cites W1975727928 @default.
• W2012577527 cites W1981383557 @default.
• W2012577527 cites W1983157642 @default.
• W2012577527 cites W1994210194 @default.
• W2012577527 cites W1997016250 @default.
• W2012577527 cites W2000062540 @default.
• W2012577527 cites W2000166660 @default.
• W2012577527 cites W2009241430 @default.
• W2012577527 cites W2009685130 @default.
• W2012577527 cites W2009949000 @default.
• W2012577527 cites W2016240134 @default.
• W2012577527 cites W2018145208 @default.
• W2012577527 cites W2024342880 @default.
• W2012577527 cites W2029284592 @default.
• W2012577527 cites W2038356882 @default.
• W2012577527 cites W2043794076 @default.
• W2012577527 cites W2046380626 @default.
• W2012577527 cites W2048682815 @default.
• W2012577527 cites W2050947525 @default.
• W2012577527 cites W2051326866 @default.
• W2012577527 cites W2056044318 @default.
• W2012577527 cites W2056437923 @default.
• W2012577527 cites W2057716183 @default.
• W2012577527 cites W2061408378 @default.
• W2012577527 cites W2065360305 @default.
• W2012577527 cites W2070689685 @default.
• W2012577527 cites W2071164559 @default.
• W2012577527 cites W2080168681 @default.
• W2012577527 cites W2080289878 @default.
• W2012577527 cites W2090146323 @default.
• W2012577527 cites W2090204133 @default.
• W2012577527 cites W2095166098 @default.
• W2012577527 cites W2105964600 @default.
• W2012577527 cites W2113887119 @default.
• W2012577527 cites W2117535191 @default.
• W2012577527 cites W2118696381 @default.
• W2012577527 cites W2162522836 @default.
• W2012577527 cites W2162551864 @default.
• W2012577527 cites W2318680343 @default.
• W2012577527 cites W2324094142 @default.
• W2012577527 cites W2326430288 @default.
• W2012577527 cites W2328718249 @default.
• W2012577527 cites W2331694901 @default.
• W2012577527 cites W2377834296 @default.
• W2012577527 cites W2748784688 @default.
• W2012577527 cites W4234414566 @default.
• W2012577527 doi "https://doi.org/10.1063/1.1726090" @default.
• W2012577527 hasPublicationYear "1964" @default.
• W2012577527 type Work @default.
• W2012577527 sameAs 2012577527 @default.
• W2012577527 citedByCount "99" @default.
• W2012577527 countsByYear W20125775272013 @default.
• W2012577527 countsByYear W20125775272015 @default.
• W2012577527 crossrefType "journal-article" @default.
• W2012577527 hasAuthorship W2012577527A5037286235 @default.
• W2012577527 hasAuthorship W2012577527A5088883764 @default.
• W2012577527 hasConcept C113603373 @default.
• W2012577527 hasConcept C121332964 @default.
• W2012577527 hasConcept C139066938 @default.
• W2012577527 hasConcept C139210041 @default.
• W2012577527 hasConcept C139358910 @default.
• W2012577527 hasConcept C147120987 @default.
• W2012577527 hasConcept C149635348 @default.
• W2012577527 hasConcept C168900304 @default.
• W2012577527 hasConcept C178790620 @default.
• W2012577527 hasConcept C184779094 @default.
• W2012577527 hasConcept C185592680 @default.
• W2012577527 hasConcept C187961010 @default.
• W2012577527 hasConcept C32909587 @default.
• W2012577527 hasConcept C38649801 @default.
• W2012577527 hasConcept C41008148 @default.
• W2012577527 hasConcept C42704618 @default.
• W2012577527 hasConcept C46141821 @default.
• W2012577527 hasConcept C4839761 @default.
• W2012577527 hasConcept C537208039 @default.
• W2012577527 hasConcept C54516573 @default.
• W2012577527 hasConcept C58312451 @default.
• W2012577527 hasConcept C62520636 @default.
• W2012577527 hasConcept C97355855 @default.
• W2012577527 hasConceptScore W2012577527C113603373 @default.
• W2012577527 hasConceptScore W2012577527C121332964 @default.
• W2012577527 hasConceptScore W2012577527C139066938 @default.
• W2012577527 hasConceptScore W2012577527C139210041 @default.
• W2012577527 hasConceptScore W2012577527C139358910 @default.
• W2012577527 hasConceptScore W2012577527C147120987 @default.
• W2012577527 hasConceptScore W2012577527C149635348 @default.
• W2012577527 hasConceptScore W2012577527C168900304 @default.
• W2012577527 hasConceptScore W2012577527C178790620 @default.

• next