Benzene rings carbon-13 substituent increments

Substituent increments Z, obtained from 13C shifts of numerous monosubstituted benzenes according to eq. (4.15) have been tabulated [383]. They permit prediction of benzene ring carbon shifts in multisubstituted benzenes according to eq. (4.16). These increments and their practical application will be summarized in Section 4.16. 

Most of the substituent increments presented in Table 4.82 can be derived from 3C shifts of benzenoid carbons in monosubstituted benzenes as listed in Table 4.53. Additional substituent increments are available for fused aromatic rings such as naphthalene and... 

Incremental shifts from benzene for the aromatic carbon atoms of representative monosubstituted benzene rings (and shifts from TMS of carbon containing substituents) are given in Table 5.9. 

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