Fluorine isotropic splitting

Both the isotropic and anisotropic F hf splittings to the two fluorines at the C=C carbons of c-C3F4 are about two times larger than those to the four fluorines of C2p4 , see Table 5.1. This suggests that both anions have almost the same type of hybrid orbital for the unpaired electron, but that the degree of unpaired electron delocalization to the a -fluorine orbitals is inversely proportional to the number of F-atoms. 

It has been concluded from the above results that the g-tensor and HFC tensor have axial symmetry with one of the tensor axes coinciding with the macromolecular axis. The data obtained allow us to calculate the isotropic values of the g-factor and the constants of splitting on nitrogen nuclei and fluorine... 

---