The rigid polycyclic nitrogen compd. was considered as a test for the reliability of internuclear distances calcd. by 1H-NMR spin-lattice relaxation rates. The 'isotropic' motional correlation time was calcd. from 13C relaxation rates (τc = 0.11 ns at 298 K). Dipolar cross-relaxation rates were calcd. by measuring non-, mono- and double-selective proton spin-lattice relaxation rates. All the exptl. rates were thoroughly accounted for by dipolar pairwise interactions. Only at high temps. a certain contribution from the spin rotational mechanism was apparent.
C-13-NMR AND H-1-NMR RELAXATION INVESTIGATION OF A POLYCYCLIC NITROGEN COMPOUND - 3,3-DIMETHYL-1,5-DIPHENYL-9-HYDROXY-BISPIDINIUM IODIDE / Delfini, Maurizio; M. R., Del Giudice; G., Settimj; E., Gaggelli; G., Valensin. - In: SPECTROSCOPY LETTERS. - ISSN 0038-7010. - STAMPA. - 22:8(1989), pp. 1079-1091. [10.1080/00387018908053959]
C-13-NMR AND H-1-NMR RELAXATION INVESTIGATION OF A POLYCYCLIC NITROGEN COMPOUND - 3,3-DIMETHYL-1,5-DIPHENYL-9-HYDROXY-BISPIDINIUM IODIDE
DELFINI, Maurizio;
1989
Abstract
The rigid polycyclic nitrogen compd. was considered as a test for the reliability of internuclear distances calcd. by 1H-NMR spin-lattice relaxation rates. The 'isotropic' motional correlation time was calcd. from 13C relaxation rates (τc = 0.11 ns at 298 K). Dipolar cross-relaxation rates were calcd. by measuring non-, mono- and double-selective proton spin-lattice relaxation rates. All the exptl. rates were thoroughly accounted for by dipolar pairwise interactions. Only at high temps. a certain contribution from the spin rotational mechanism was apparent.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.