Synthesis and Protonation Behaviour of the Macrocyclic Ligand 1,4,7,13-Tetramethyl-1,4,7,10,13,16-hexaazacycloocatadecane and of its Bicyclic Derivative 4,7,10,17,23-pentamethyl-1, 4,7,10, 13,17,23-heptaazabicyclo[11.7.5]-pentacosane. A Potenzio-metric and 1H and 13C NMR Study

Bencini A.;Bianchi A.;Garcia Espana E.;FUSI, VIERI;MICHELONI, MAURO SERGIO;Paolett P.;Ramirez J. A.;Valtancoli B.

1992