For each of the following molecules determine which groups of protons or l9F nuclei (if any) are chemically or magnetically equiv not alent, giving your reasons Hence describe each spin system using the conventional notation (you may assume that all spins, other than those whose shifts are identica...

In the following H a H b is a short hand for saying that the environments and hence shifts of H a and H b are the same Likewise H a H b is a shorthand ...

For each of the following molecules determine which groups of protons or l9F nuclei (if any) are

Question:

For each of the following molecules determine which groups of protons or l9F nuclei (if any) are chemically or magnetically equiv¬alent, giving your reasons. Hence describe each spin system using the conventional notation (you may assume that all spins, other than those whose shifts are identical by symmetry, are weakly coupled). In (e) and (f) ignore couplings over more than four bonds, and in (g) and (h) only consider those protons attached to ca rbon.