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NMR Nomenclature: Nuclear Spin Properties and Conventions for Chemical Shifts—IUPAC Recommendations

✍ Scribed by Robin K. Harris; Edwin D. Becker

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
72 KB
Volume
156
Category
Article
ISSN
1090-7807

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✦ Synopsis

Scientific advances are facilitated by the international adoption of standardised notation and by the establishment of accurate numerical values for many physical quantities. The body charged with oversight of these areas for chemists is the International Union of Pure and Applied Chemistry (IUPAC). Its first attempts at standardisation of NMR data appeared (1, 2) in the 1970s. These publications established the conventions for chemical shifts and generally have stood the test of time. The famous "Green Book" titled Quantities, Units and Symbols in Physical Chemistry (3) contains, inter alia, a table of the TABLE 1 The Spin Properties of Spin-1/2 Nuclei Relative receptivity Natural abundance Magnetic moment Magnetogyric ratio Frequency ratio Reference Sample Isotope (x/%) (µ/µ N ) ( γ /10 7 rad s -1 T -1 ) ( Ξ/%) compound conditions D p D C

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A unified scale is recommended for reporting the NMR chemical shifts of all nuclei relative to the (1)H resonance of tetramethylsilane. The unified scale is designed to provide a precise ratio, Xi, of the resonance frequency of a given nuclide to that of the primary reference, the (1)H resonance of

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## Abstract An Addendum has been published for this article in Magnetic Resonance in Chemistry 40(9) 2002, 622. A unified scale is recommended for reporting the NMR chemical shifts of __all__ nuclei relative to the ^1^H resonance of tetramethylsilane. The unified scale is designed to provide a pre

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We regret that the numbering of chapters and sections, which is important for frequent references in the text, was not printed. The following list provides the necessary information:

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## Abstract IUPAC has published a number of recommendations regarding the reporting of nuclear magnetic resonance (NMR) data, especially chemical shifts. The most recent publication [**__Pure Appl. Chem.__** **73**, 1795 (2001)] recommended that tetramethylsilane (TMS) serve as a universal referenc