Nuclear magentic resonance

B3LYP/6-31G computations. Thus, 3 mol of 1-pentene was cyclopropanated to 89-93% conversion with CCI2 (generated by the phase-transfer-catalyzed reaction of CHCI3 and NaOH). The unreacted 1-pentene was isolated and brominated, and the resulting dibromide was analyzed by and nuclear magentic resonance (NMR) spectroscopy. The C and H isotopic abundances were compared to those in dibromide derived from a sample of the initial 1-pentene, leading to the isotope effects shown for a typical experiment in structure 18 (Fig. 7.10). 

Ernst, R.R., Bodenhausen, G. and Wokaun, A. (1987) Principles of Nuclear Magentic Resonance in One and Two Dimensions, Clarendon Press, Oxford. 

Fig. 3.41 Proton magentic resonance spectrum (top) and, 3C nuclear magnetic resonance spectrum (bottom) of 3-methylheptane. Data reproduced from G. C. Levy and C. L. Nelson (1972). Carbon-13 Nuclear Magnetic Resonance for Organic Chemists. New York Wiley-Interscience, p. 39.

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