The number of peaks into which the P 31 signal is split is to be determined. The difference in chemical shift in hertz between the lowest and highest field peaks of the P 31 multiplet is to be determined. Concept introduction: Splitting of a proton signal is a result of coupling with an atom which has a nuclear spin of ± 1 2 . The number of peaks into which an NMR signal is split is equal to n+1 , where n is the number of coupling atoms in vicinal (or geminal) position. Naturally occurring phosphorus is monoisotopic, P 31 , and has a nuclear spin of ± 1 2 . As a result, phosphorus atom can also split the signal of a proton in a geminal or vicinal position. The separation between adjacent peaks is equal to the coupling constant. The signals of both coupled atoms are split by the same value.

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Chapter 14, Problem 45P

Interpretation Introduction

Interpretation:

The number of peaks into which the P31 signal is split is to be determined. The difference in chemical shift in hertz between the lowest and highest field peaks of the P31 multiplet is to be determined.

Concept introduction:

Splitting of a proton signal is a result of coupling with an atom which has a nuclear spin of ±12.

The number of peaks into which an NMR signal is split is equal to n+1, where n is the number of coupling atoms in vicinal (or geminal) position.

Naturally occurring phosphorus is monoisotopic, P31, and has a nuclear spin of ±12. As a result, phosphorus atom can also split the signal of a proton in a geminal or vicinal position.

The separation between adjacent peaks is equal to the coupling constant.

The signals of both coupled atoms are split by the same value.

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