Term
| True or false:The IUPAC has established a separate chemical shift standard for each NMR-active nucleus in the periodic table. |
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Definition
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Term
| True or false:The 2nI + 1 rule of spin-spin couplings of 1H or 13C nuclei does not apply to non-spin 1/2 nuclei. |
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Definition
| false, 2nI + 1 rule apply for all spin nuclei |
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Term
| True or false:1H-15N HSQC is much faster than 1D 15N NMR for natural abundance 15N with attached protons because of increased sensitivity by inverse detection via polarization transfer and NOE from attached proton(s). |
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Definition
| true it is much faster for that reason |
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Term
| True or false: 19F and 31P are very useful NMR nuclei because they are both 100% natural abundance and spin 1/2 nuclei with strong magnetogyric ratios. |
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Definition
| yes 19F and 31P are 100% isotope and spin 1/2 |
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Term
| True or false:The 1H peak of tetramethylsilane (TMS) at 0.00 ppm in a typical NMR spectrum shows ~ 4.7% combined intensity satellites equally spaced on each side that is a doublet from coupling to the 4.7% natural abundance of 13C. |
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Definition
| false has to do with 4.7 natural abundance of silicon |
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