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- W1977305890 abstract "Principal component analysis was applied to the 13C NMR chemical shifts of the seven carbon atoms of the norbornyl framework for 75 molecules. Two two-dimensional principal component projections are shown to be sufficient to distinguish the main electronic and steric substituent effects contributing to these shifts. These effects allow a comparison of the (three-, four- and five-membered) ring and non-ring substituents and their influence on the shifts of carbon atoms of the norbornyl framework. Four classes of molecules, each with characteristic chemical behaviour, are identified. Exo-endo class discrimination and exo-endo patterns of isomer pairs are emphasized, especially with regard to cyclic substituents on norbornyl systems." @default.
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- W1977305890 date "1989-03-01" @default.
- W1977305890 modified "2023-10-02" @default.
- W1977305890 title "Principal component analysis of the13C NMR shifts of norbornyl derivatives" @default.
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- W1977305890 doi "https://doi.org/10.1002/mrc.1260270314" @default.
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