Abstract
Fullerenes are ideal traps for atomic nitrogen and phosphorus. The inert shell of the fullerenes protects these very reactive atoms from the surrounding and keeps them stable at ambient conditions. Electron paramagnetic resonance (EPR) measurements give clear evidence that the enclosed atoms reside at the center of the cage and keep their atomic ground state configuration. Quantum-chemical calculations confirm these findings. In this contribution the complexes N@C60, N@C70 and P@C60 will be discussed. Special attention will be paid to: i) the stability of endohedral complexes, ii) the g-factor shift between N@C60 and N@C70 and iii) the vibrations of the atoms in the cage. A new cage which is able to entrap atomic hydrogen will be shortly described.
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