Tetrahedron p. 793 - 798 (1984)
Update date:2022-08-03
Topics:
Sonveaux, E.
Various N,N'-diaryl derivatives of 1,4,10,13-tetraoxa-7,16-diazacyclooctadecane were synthesized. 7,16-diphenyl-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane had only a low affinity for cations.On the contrary, diamide derivatives of 7,16-di<(2-amino)phenyl>-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane were deprotonated by Cu(II) and formed stable chelates.Spectral data suggest that monodeprotonation gives dissymmetric 1:1-complexes and dideprotonation gives symmetric 1:1-complexes.
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(1992)
