| Abstract: | p-tert Butylcalixn]arenes 1 and 2 react with the cyclic amines 3 – 8 , 10 by proton transfer forming so-called „exo-complexes”︁ between the ammonium and phenolate groups. As well endocyclic as exocyclic amino groups are reactive. The nitroxyl radical 9 does not react with 1 or 2 by the proton transfer reaction. These results demonstrate that an interaction between the nitrogen atom of HALS-compounds, esp. compound 10 , with calixn]arene hydroxylgroups is possible, but an interaction between the corresponding nitroxyl radicals with calixn]arene hydroxylgroups does not occur. |
