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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 26, Number 1
JKCSEZ 26(1)
February 20, 1982 

 
Title
Mixed Lanthanide Shift Reagents

혼합 란탄족 Shift Reagents
Author
Man-Ho Lee, Charles N. Reilley

이만호, Charles N. Reilley
Keywords
Abstract
란탄족 화합물인 Ln(fod)3 (Ln = Pr, Nd, Eu 및 Yb)를 사용하여 contact-only (COM) 및 dipolar-only (DOM) 2성분계 혼합물을 만든 후 기질인 4-picoline의 Fi 및 Gi값을 핵자기공명 이동으로 부터 측정하였다. 그 결과 Pr(fod)3 및 Eu(fod)3의 혼합물인 COM 1 및 DOM 1으로 얻은 값들을 단일 Ln(fod)3로 얻은 값들과 잘 일치하였다. 그러나 Nd(fod)3 및 Yb(fod)3의 혼합물인 COM 2 및 DOM 2로 얻을 값들을 단일 Ln(fod)3로 얻은 값들과 상당한 오차를 나타내었다. 그 오차는 이테르븀(Yb) 착물에 기인하는 것으로 추정되었다.

Contact-only (COM) and dipolar-only (DOM) mixtures of the lanthanide shift reagents were prepared based on the Fi and Gi values deduced using individual Ln(fod)3 (Ln = Pr, Nd, Eu, and Yb) and 4-picoline. The Fi and Gi values obtained directly by COM 1 and by DOM 1, which were appropriate mixture of Pr(fod)3 and Eu(fod)3, agreed well with those values obtained by experiments using individual Ln(fod)3 shift reagents. Ei and Gi values obtained directly by COM 2 and by DOM 2, which were mixtures of Nd(fod)3 and Yb(fod)3, deviated from the expected values. The error was traced to the behavior of the ytterbium complexes.

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