The 13C dipole-dipole relaxation times of tetraoxa-, pentaoxa-, hexaoxa-cyclooctadecane, and dioxohexaoxacyclooctadecane were obtained in acetone-d6 by the aid of the inversion recovery method at 15.0 MHz. The dependence of dipolar relaxation time on the molecular size and the conformational aspects of cyclo-polyoxa molecules, (CH2OCH2)n, are discussed from the point of view of the cation-binding properties of such compounds. It is concluded that the T1DD values reflect the rate of pseudorotation and therefore the flexible nature of the ring which causes the preference of the cation binding; accordingly, the rigidity determines the degree of stability of ion-molecule complexes.
Çakil Erk, "The 13C Dipole-Dipole Relaxation and Pseudorotation of Some Macrocyclic Ethers and a Polyoxalactone," Appl. Spectrosc. 40, 100-103 (1986)
References are not available for this paper.
OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.