For a given set of molecules the number of signals expected in 1 H NMR spectrum to be identified. Concept Introduction : 1 H NMR : A technique gives information to predict the Carbon and Hydrogen connectivity in the organic compounds. Homotopic: If the protons are interchangeable through rotational symmetry, then the protons are chemically equivalent and termed as homotopic. Enantiotopic protons: If subjected protons in the molecule can be interchanged through rotational or reflection symmetry known as Enantiotopic protons and the protons are chemically equivalent. Diastereotopic: If the protons are not interchangeable through either of the symmetry operations, then the protons are Diastereotopic; the protons are not chemically equivalent if a chiral center present in the molecule. Replacement test: In the molecule replacing each one of the subjected protons with deuterium gives the two compounds are same; then the protons are chemically equivalent.

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Chapter 16, Problem 48PP

Interpretation Introduction

Interpretation: For a given set of molecules the number of signals expected in 1H NMR spectrum to be identified.

Concept Introduction:

1H NMR : A technique gives information to predict the Carbon and Hydrogen connectivity in the organic compounds.

Homotopic: If the protons are interchangeable through rotational symmetry, then the protons are chemically equivalent and termed as homotopic.

Enantiotopic protons: If subjected protons in the molecule can be interchanged through rotational or reflection symmetry known as Enantiotopic protons and the protons are chemically equivalent.

Diastereotopic: If the protons are not interchangeable through either of the symmetry operations, then the protons are Diastereotopic; the protons are not chemically equivalent if a chiral center present in the molecule.

Replacement test: In the molecule replacing each one of the subjected protons with deuterium gives the two compounds are same; then the protons are chemically equivalent.

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