FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2008209543> ?p ?o ?g. }

• W2008209543 endingPage "127" @default.
• W2008209543 startingPage "118" @default.
• W2008209543 abstract "Phosphorus-31 1D NMR spectra of a stationary powder sample of a phosphole tetramer containing two phosphorus spin pairs have been obtained at 4.7 T and 9.4 T. In order to separate 31 P- 31 P spin-spin coupling from anisotropic chemical shielding, 2D spin-echo NMR spectra have been acquired. Phosphorus-31 CPMAS NMR experiments indicate that the two spin pairs of the tetramer are equivalent and each may be treated as an isolated spin pair. Within a given spin pair, the difference between the isotropic chemical shifts of two directly bonded phosphorus nuclei is 1.7 ppm. As well, they are spin-spin coupled by both the indirect and direct interactions, 1 J( 31 P, 31 P) = -362 Hz and R DD = 1.80 kHz, respectively. The principal components and relative orientation of the two phosphorus chemical shielding tensors have been determined using the dipolar-chemical shift technique; however, since the dipolar tensor is axially symmetric, ambiguities in the chemical shielding tensor orientation relative to the molecular framework result. Using ab initio calculations and simulations of the 2D spin-echo spectra, many of these ambiguities have been resolved. The spans and skews of the phosphorus shielding tensors for all four three-coordinate phosphorus nuclei are the same within experimental error, 115 ppm and 0.70, respectively. Combined experimental and theoretical results indicate that the phosphorus shielding tensor orientations are dictated by the local environment. For both shielding tensors, the most shielded component, δ 33 , is approximately 78° from the P-P bond and in the phosphole ring plane. The relative orientation of the δ 33 components is described by a dihedral angle of 82°, similar to the dihedral angle of approximately 76° defining the twist of the phosphole rings about the bridging P-P bond.Key words: solid-state 31 P NMR, phosphorus chemical shielding tensors, phosphole tetramer, 31 P— 31 P spin pairs, ab initio calculations." @default.
• W2008209543 created "2016-06-24" @default.
• W2008209543 creator A5001661098 @default.
• W2008209543 creator A5039113643 @default.
• W2008209543 creator A5053255592 @default.
• W2008209543 creator A5058851361 @default.
• W2008209543 creator A5063169585 @default.
• W2008209543 creator A5069654813 @default.
• W2008209543 creator A5070306314 @default.
• W2008209543 date "2000-01-15" @default.
• W2008209543 modified "2023-09-26" @default.
• W2008209543 title "Characterization of phosphorus chemical shielding tensors in a phosphole tetramer: a combined experimental and theoretical study" @default.
• W2008209543 cites W1975064393 @default.
• W2008209543 cites W2951802059 @default.
• W2008209543 doi "https://doi.org/10.1139/v99-229" @default.
• W2008209543 hasPublicationYear "2000" @default.
• W2008209543 type Work @default.
• W2008209543 sameAs 2008209543 @default.
• W2008209543 citedByCount "7" @default.
• W2008209543 crossrefType "journal-article" @default.
• W2008209543 hasAuthorship W2008209543A5001661098 @default.
• W2008209543 hasAuthorship W2008209543A5039113643 @default.
• W2008209543 hasAuthorship W2008209543A5053255592 @default.
• W2008209543 hasAuthorship W2008209543A5058851361 @default.
• W2008209543 hasAuthorship W2008209543A5063169585 @default.
• W2008209543 hasAuthorship W2008209543A5069654813 @default.
• W2008209543 hasAuthorship W2008209543A5070306314 @default.
• W2008209543 hasConcept C111429119 @default.
• W2008209543 hasConcept C121332964 @default.
• W2008209543 hasConcept C140463767 @default.
• W2008209543 hasConcept C144002745 @default.
• W2008209543 hasConcept C147597530 @default.
• W2008209543 hasConcept C147789679 @default.
• W2008209543 hasConcept C150769733 @default.
• W2008209543 hasConcept C155281189 @default.
• W2008209543 hasConcept C178790620 @default.
• W2008209543 hasConcept C181199279 @default.
• W2008209543 hasConcept C184050105 @default.
• W2008209543 hasConcept C185592680 @default.
• W2008209543 hasConcept C2265751 @default.
• W2008209543 hasConcept C2524010 @default.
• W2008209543 hasConcept C2776017861 @default.
• W2008209543 hasConcept C2778886173 @default.
• W2008209543 hasConcept C33923547 @default.
• W2008209543 hasConcept C42704618 @default.
• W2008209543 hasConcept C4839761 @default.
• W2008209543 hasConcept C510538283 @default.
• W2008209543 hasConcept C62520636 @default.
• W2008209543 hasConcept C66974803 @default.
• W2008209543 hasConcept C67787023 @default.
• W2008209543 hasConcept C71240020 @default.
• W2008209543 hasConcept C8010536 @default.
• W2008209543 hasConcept C85725439 @default.
• W2008209543 hasConcept C97355855 @default.
• W2008209543 hasConceptScore W2008209543C111429119 @default.
• W2008209543 hasConceptScore W2008209543C121332964 @default.
• W2008209543 hasConceptScore W2008209543C140463767 @default.
• W2008209543 hasConceptScore W2008209543C144002745 @default.
• W2008209543 hasConceptScore W2008209543C147597530 @default.
• W2008209543 hasConceptScore W2008209543C147789679 @default.
• W2008209543 hasConceptScore W2008209543C150769733 @default.
• W2008209543 hasConceptScore W2008209543C155281189 @default.
• W2008209543 hasConceptScore W2008209543C178790620 @default.
• W2008209543 hasConceptScore W2008209543C181199279 @default.
• W2008209543 hasConceptScore W2008209543C184050105 @default.
• W2008209543 hasConceptScore W2008209543C185592680 @default.
• W2008209543 hasConceptScore W2008209543C2265751 @default.
• W2008209543 hasConceptScore W2008209543C2524010 @default.
• W2008209543 hasConceptScore W2008209543C2776017861 @default.
• W2008209543 hasConceptScore W2008209543C2778886173 @default.
• W2008209543 hasConceptScore W2008209543C33923547 @default.
• W2008209543 hasConceptScore W2008209543C42704618 @default.
• W2008209543 hasConceptScore W2008209543C4839761 @default.
• W2008209543 hasConceptScore W2008209543C510538283 @default.
• W2008209543 hasConceptScore W2008209543C62520636 @default.
• W2008209543 hasConceptScore W2008209543C66974803 @default.
• W2008209543 hasConceptScore W2008209543C67787023 @default.
• W2008209543 hasConceptScore W2008209543C71240020 @default.
• W2008209543 hasConceptScore W2008209543C8010536 @default.
• W2008209543 hasConceptScore W2008209543C85725439 @default.
• W2008209543 hasConceptScore W2008209543C97355855 @default.
• W2008209543 hasIssue "1" @default.
• W2008209543 hasLocation W20082095431 @default.
• W2008209543 hasOpenAccess W2008209543 @default.
• W2008209543 hasPrimaryLocation W20082095431 @default.
• W2008209543 hasRelatedWork W1987354293 @default.
• W2008209543 hasRelatedWork W1991105709 @default.
• W2008209543 hasRelatedWork W1999446354 @default.
• W2008209543 hasRelatedWork W2016572718 @default.
• W2008209543 hasRelatedWork W2028055064 @default.
• W2008209543 hasRelatedWork W2032731460 @default.
• W2008209543 hasRelatedWork W2041514034 @default.
• W2008209543 hasRelatedWork W2064047298 @default.
• W2008209543 hasRelatedWork W2074323288 @default.
• W2008209543 hasRelatedWork W2074421665 @default.
• W2008209543 hasRelatedWork W2078018232 @default.
• W2008209543 hasRelatedWork W2080481844 @default.
• W2008209543 hasRelatedWork W2081344973 @default.

• next