'Excess population' diaporamas de présentation

900 MHz NMR

900 MHz NMR. Characteristics of Principal Spectrometric Methods. 1 H-NMR. 13 C-NMR. MS. IR. Scale. 0-15 ppm. 1-220 ppm. 50-4000 amu. 400-4000 cm -1. Sample. 1-2 mg. 10-20 mg. < 1 mg. < 1 mg. Molecular formula. Partial. Partial. Yes. No. Functional group. ~ yes. ~ yes.

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The Second World War

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Introduction to C-13 NMR

Introduction to C-13 NMR. The 13 C nucleus is present in only 1.08% natural abundance. Therefore, acquisition of a spectrum usually takes much longer than in 1 H NMR. The magnetogyric ratio of the 13 C nucleus is about 1/4 that of the 1 H nucleus.

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