Abstract
Complexes between lanthanide nitrates and the cyclic polyethers 18-crown-6 and dicyclohexano-18-crown-6 have been synthesized; the reactions occur rapidly and in high yield. The crown ether-salt complexes have been characterized by melting point, infrared and ultraviolet spectrophotometry, conduct anee ana 1 ysis, and nuc1ear magnetic resona nee spectrometry. NMR sp ctra of uncomplexed and complexed crown ethers were identical; I tt'le uncomplexed salts were more soluble in NMR solvents than were the complexes. In most cases the crown ether-salt complexes are usable shift reagents and induce greater shifts than do the uncomplexed lanthanide salts in both proton and carbon magnetic resonance spectrometry. Of the substrates studied, triglycine was affected by these shift reagents to the greatest degree. Contact and pseudo-contact shift contributions were estimated and consistent with the literature.
Library of Congress Subject Headings
Rare earth metals; Ether
Publication Date
8-1977
Document Type
Thesis
Student Type
Graduate
Degree Name
Chemistry (MS)
Department, Program, or Center
School of Chemistry and Materials Science (COS)
Advisor
T. C. Morrill
Advisor/Committee Member
R. H. Gilman
Recommended Citation
Long, David J., "Lanthanide shift reagents involving crown ethers" (1977). Thesis. Rochester Institute of Technology. Accessed from
https://repository.rit.edu/theses/10336
Campus
RIT – Main Campus
Plan Codes
CHEM-MS
