Carbon, hybridisation

Table 2.6. Structural features (carbon hybridisation, electronegativity, ring size) and typical one-bond CH coupling constants Jch (Hz) ...

The 13C NMR spectrum illustrates the connection between carbon hybridisation and 13C shift on the one hand and Jqh coupling constants on the other. 

This order reflects the ease with which a proton may be removed from a carbon hybridised in any one of the above ways, i.e. this reflects the acidity of such a hydrogen. 

The principal factor in determining the magnitudes of these is carbon hybridisation. 

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