Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
권호 표지

Mixed Lanthanide Shift Reagents

혼합 란탄족 Shift Reagents

  • Man-Ho Lee (Department of Industrial Chemistry, Kyungpook National University) ;
  • Charles N. Reilley (Department of Chemistry, Univeristy of North Carolina)
  • 이만호 (경북대학교 공과대학 응용화학과) ;
  • Published : 1982.02.28
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Abstract

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 $F_i$ and $G_i$ 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.

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 $F_i$ 및 $G_i$값을 핵자기공명 이동으로 부터 측정하였다. 그 결과 Pr$(fod)_3$ 및 Eu$(fod)_3$의 혼합물인 COM 1 및 DOM 1으로 얻은 값들을 단일 Ln$(fod)_3$로 얻은 값들과 잘 일치하였다. 그러나 $(fod)_3$ 및 Yb$(fod)_3$의 혼합물인 COM 2 및 DOM 2로 얻을 값들을 단일 Ln$(fod)_3$로 얻은 값들과 상당한 오차를 나타내었다. 그 오차는 이테르븀(Yb) 착물에 기인하는 것으로 추정되었다.

Keywords

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