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Some selected bond distances (in Å) for group II structures (a) and (b) (see Figure 5). NiF represents the distance between surface nickel and fluorine atoms, CF is the distance between carbon and fluorine, HF the distance between hydrogen and fluorine and HH the distance between hydrogen atoms.
| Structure | d (NiF) | d (NiF) | d (CF) | d (CF) | d (HF) | d (HH) |
|---|---|---|---|---|---|---|
| II-(a) | 2.063 | 2.194 | 1.369 | 1.421 | 1.047 | 0.752 |
| II-(b) | 1.830 | 2.860 | 1.357 | 1.452 | 1.010 | 0.752 |
