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13C and 1H two-dimensional NMR characterization of the sodium perchlorate complex of a new tetraoxatetraaza lipophilic cage ligand

✍ Scribed by P. L. Anelli; F. Montanari; H. Molinari; S. Quici; T. Beringhelli

Publisher
John Wiley and Sons
Year
1986
Tongue
English
Weight
670 KB
Volume
24
Category
Article
ISSN
0749-1581

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✦ Synopsis

C and 'H NMR characterization of the sodium perchlorate complex of a new tetraoxatetraaza lipophilic cage ligand (1) derived from 1,7-dioxa-4,10-diazacyclododecane has been performed. 'H homonuclear correlated and 'H J-resolved two-dimensional experiments allowed the recognition of resonances due to different types of OCH,CH,N fragments, and of those of the hydrogens of the bridging chains. I3C resonances have been assigned on the basis of a %-'H heteronuclear correlated two-dimensional experiment, together with the 13C NMR spectra of the synthetic precursors of 1. 13C spin-lattice relaxation times and NOE measurements established that the unique relaxation mechanism is dipole-dipole; the calculated rotational correlation times indicated that molecular reorientation is isotropic. 13C spectra and relaxation times obtained in different solvents showed that specific solute-solvent interactions are absent.

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