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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 11, Number 5
BKCSDE 11(5)
May 20, 1990 

13C NMR Studies of the Chelate Ring Opening-Closing Process in (Nitrilotriacetato)vanadate(Ⅴ) dioxovandate(Ⅴ) Ion
Man Ho Lee*, Kjeld Schaumburg
Activation parameters of the exchange between two types of glycinate groups in (nitrilotriacetato)dioxovanadate(Ⅴ) ion, [VO2(NTA)]2-, have been determined as the results of 13C NMR measurements over a range of temperatures between 277 and 306。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.
399 - 402
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