Dale DeCann


A complex of the lanthanide salt, praseodymium nitrate, and the crown ether, 15-crown-5 has been isolated. The characterization of this complex by elemental analysis, melting point, H and C NMR, UV-visible and IR has indicated that the isolable solid compound is a 1:1 stoichiometric complex of the two reactants and is unsolvated. The application of this complex as a lanthanide shift reagent does not appear to be very feasible due to its insolubility in the non-polar solvents typically used in NMR experiments. Studies of the shifting ability of this complex as well as an inves tigation of the shifting ability of other complexes made in this laboratory indicate that they induce chemical shifts that are no different from shifts induced by the lanthanide salt in the absence of the crown ether. All evidence indicates that the complex dissociates in the polar solvents in which it is soluble.

Library of Congress Subject Headings

Chemical tests and reagents; Nuclear magnetic resonance

Publication Date


Document Type


Student Type


Degree Name

Chemistry (MS)

Department, Program, or Center

School of Chemistry and Materials Science (COS)


Terence Morrill


Physical copy available from RIT's Wallace Library at QD77 .D42


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