Chapter 13.SE, Problem 62GP

Interpretation Introduction

Interpretation:

The molecular formula and the structure of an unknown compound to be predicted using spectrum details.

Concept introduction:

Molecular formula:

It represents the types of atoms with their total number present in a given molecule.

The ¹³CNMR spectrum gives information on the different electronic environments of carbon. As like ¹HNMR, the number of signals generated in ¹³CNMR are predicted by performing symmetry operations (rotation or reflection symmetry). Only chemical shift values are reported in the spectrum but not the multiplicity and integration values because the coupling between two neighboring ¹³C-¹³ C nuclei are weakly involved due to the low abundance of ¹³C isotopes of carbon atom.

To identify: The structure to be predicted for C₅H₁₀O.