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13 C and 1 H two‐dimensional NMR characterization of the sodium perchlorate complex of a new tetraoxatetraaza lipophilic cage ligand
Author(s) -
Anelli P. L.,
Montanari F.,
Molinari H.,
Quici S.,
Beringhelli T.
Publication year - 1986
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260240813
Subject(s) - chemistry , homonuclear molecule , heteronuclear molecule , nmr spectra database , crystallography , ligand (biochemistry) , rotational correlation time , relaxation (psychology) , spin–lattice relaxation , nuclear magnetic resonance spectroscopy , perchlorate , spectral line , carbon 13 nmr , proton nmr , dipole , stereochemistry , nuclear magnetic resonance , molecule , ion , organic chemistry , nuclear quadrupole resonance , psychology , social psychology , biochemistry , physics , receptor , astronomy
13 C and 1 H NMR characterization of the sodium perchlorafe complex of a new tetraoxatetraaza lipophilic cage ligand (1) derived from 1,7‐dioxa‐4,10‐diazacyclododecane has been performed. 1 H homonuclear correlated and 1 H J ‐resolved two‐dimensional experiments allowed the recognition of resonances due to different types of OCH 2 CH 2 N fragments, and of those of the hydrogens of the bridging chains. 13 C resonances have been assigned on the basis of a 13 C 1 H heteronuclear correlated two‐dimensional experiment, together with the 13 C NMR spectra of the synthetic precursors of 1. 13 C 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. 13 C spectra and relaxation times obtained in different solvents showed that specific solute‐solvent interactions are absent.