To deduce the structure of the compound using the given ¹H NMR spectrum, follow these steps:
Step 1: Identify the unique protons
Examine the ¹H NMR spectrum and count the number of different peaks. Each peak represents a set of unique protons in the molecule.
Step 2: Analyze the chemical shift
Look at the chemical shift values (in ppm) for each peak. This information can help determine the type of protons (e.g. alkyl, alkenyl, aromatic, or adjacent to heteroatoms like Br).
Step 3: Analyze the splitting
Examine the splitting patterns of each peak (singlet, doublet, triplet, etc.). This will give information about the number of neighboring protons (n) following the n+1 rule.
Step 4: Analyze the integration
Determine the integration or relative area of each peak, which will give you the ratio of protons for each unique set in the molecule.
Step 5: Determine the suggested connectivity
Use the information from the chemical shift, splitting, and integration to suggest connectivity for the fragments in the molecule.
Step 6: Put the fragments together
Combine the fragments based on the connectivity and the presence of C, H, and Br in the molecule.
Step 7: Confirm the deduced compound fits the data
Check if the deduced compound fits the ¹H NMR spectrum data (chemical shift, splitting, and integration) and has the correct elements (C, H, Br).
Following these steps will allow you to deduce the structure of the compound using the provided ¹H NMR spectrum.