Figure 3: Calculated hfccs of nitrogen atoms at the MP2 level.
From: X-ray observation of a helium atom and placing a nitrogen atom inside He@C60 and He@C70
(a) The hfccs of N@C60, HeN@C60 and HeN@C60–He (the helium atom being removed from the optimized structure of HeN@C60). (b) The hfccs of a free nitrogen atom and the nitrogen atoms with a neighbouring helium atom at the distance of 3.75 Å (optimized distance) and 2.07 Å (extracted distance from HeN@C60).
