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- Chemical_shift abstract "In nuclear magnetic resonance (NMR) spectroscopy, the chemical shift is the resonant frequency of a nucleus relative to a standard. Often the position and number of chemical shifts are diagnostic of the structure of a molecule. Chemical shifts are also used to describe signals in other forms of spectroscopy such as photoemission spectroscopy.Some atomic nuclei possess a magnetic moment (nuclear spin), which gives rise to different energy levels and resonance frequencies in a magnetic field. The total magnetic field experienced by a nucleus includes local magnetic fields induced by currents of electrons in the molecular orbitals (note that electrons have a magnetic moment themselves). The electron distribution of the same type of nucleus (e.g. 1H, 13C, 15N) usually varies according to the local geometry (binding partners, bond lengths, angles between bonds, ...), and with it the local magnetic field at each nucleus. This is reflected in the spin energy levels (and resonance frequencies). The variations of nuclear magnetic resonance frequencies of the same kind of nucleus, due to variations in the electron distribution, is called the chemical shift. The size of the chemical shift is given with respect to a reference frequency or reference sample (see also chemical shift referencing), usually a molecule with a barely distorted electron distribution.".
- Chemical_shift wikiPageExternalLink whatisnmr.html.
- Chemical_shift wikiPageExternalLink problems.html.
- Chemical_shift wikiPageExternalLink www.bmrb.wisc.edu.
- Chemical_shift wikiPageExternalLink ~webspectra.
- Chemical_shift wikiPageExternalLink kombi1.htm.
- Chemical_shift wikiPageExternalLink cdata.htm.
- Chemical_shift wikiPageExternalLink hdata.htm.
- Chemical_shift wikiPageExternalLink answers1-32.GIF.
- Chemical_shift wikiPageExternalLink answers33-64.GIF.
- Chemical_shift wikiPageExternalLink workbook.html.
- Chemical_shift wikiPageExternalLink NMRTABLE.HTM.
- Chemical_shift wikiPageID "1228638".
- Chemical_shift wikiPageRevisionID "592905338".
- Chemical_shift hasPhotoCollection Chemical_shift.
- Chemical_shift subject Category:Nuclear_chemistry.
- Chemical_shift subject Category:Nuclear_magnetic_resonance.
- Chemical_shift subject Category:Nuclear_physics.
- Chemical_shift subject Category:Spectroscopy.
- Chemical_shift comment "In nuclear magnetic resonance (NMR) spectroscopy, the chemical shift is the resonant frequency of a nucleus relative to a standard. Often the position and number of chemical shifts are diagnostic of the structure of a molecule. Chemical shifts are also used to describe signals in other forms of spectroscopy such as photoemission spectroscopy.Some atomic nuclei possess a magnetic moment (nuclear spin), which gives rise to different energy levels and resonance frequencies in a magnetic field.".
- Chemical_shift label "Chemical shift".
- Chemical_shift label "Chemische Verschiebung".
- Chemical_shift label "Chemische verschuiving".
- Chemical_shift label "Desplazamiento químico".
- Chemical_shift label "Déplacement chimique".
- Chemical_shift label "Spostamento chimico".
- Chemical_shift label "Химический сдвиг".
- Chemical_shift label "化学位移".
- Chemical_shift sameAs Chemische_Verschiebung.
- Chemical_shift sameAs Desplazamiento_químico.
- Chemical_shift sameAs Déplacement_chimique.
- Chemical_shift sameAs Spostamento_chimico.
- Chemical_shift sameAs Chemische_verschuiving.
- Chemical_shift sameAs m.04k978.
- Chemical_shift sameAs Q899127.
- Chemical_shift sameAs Q899127.
- Chemical_shift wasDerivedFrom Chemical_shift?oldid=592905338.
- Chemical_shift isPrimaryTopicOf Chemical_shift.
