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Synthesis and protonation behaviour of the macrocyclic ligand 1,4,7,13-tetramethyl-1,4,7,10,13,16-hexaazacyclooctadecane and of its bicyclic derivative 4,7,10,17,23-pentamethyl-1,4,7,10,13,17,23-heptaazabicyclo[11.7.5]-pentacosane. A potentiometric and 1H and 13C NMR study

✍ Scribed by Bencini, Andrea; Bianchi, Antonio; Garcia-Espa�a, Enrique; Fusi, Vieri; Micheloni, Mauro; Paoletti, Piero; Ramirez, Jos� Antonio; Rodriguez, Agustin; Valtancoli, Barbara

Book ID
118060983
Publisher
Royal Society of Chemistry
Year
1992
Tongue
English
Weight
839 KB
Volume
7
Category
Article
ISSN
1472-779X

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## Abstract The molecular structures of the title compounds 3 and 5 were investigated by NMR and X‐ray structural methods. The NMR results suggest two equivalent halves for both molecules. The X‐ray study shows an approximate mirror plane for 3 and an approximate twofold axis for a significant port