Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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$^{13}C$ NMR Studies of the Chelate Ring Opening-Closing Process in (Nitrilotriacetato)vanadate(V) dioxovandate(V) Ion

  • Lee, Man-Ho (Department of Industrial Chemistry, Kyungpook National University) ;
  • Schaumburg, Kjeld (Department of Chemical Physics, University of Copenhagen)
  • Published : 1990.10.20
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Abstract

Activation parameters of the exchange between two types of glycinate groups in (nitrilotriacetato)dioxovanadate(V) ion, $[VO_2(NTA)]^{2-}$, have been determined as the results of $^{13}C$ NMR measurements over a range of temperatures between 277 and 306$^{\circ}K$. The exchange mechanism is proposed on the basis of the chelate ring opening-closing process, assuming rupture of the metal-oxygen (glycinate) bond trans to V = O bond to give a five-coordinated intermediate.

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