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- W2024553645 abstract "Abstract The rates and mechanisms of the isotopic exchange reactions of Y(III) ions with; Y(EDTA)−, Y(DCTA)−, Y(DTPA)2− and Y(HEDTA) complex ions in aqueous solution, have been investigated. The rate equations and experimentally determined rate constants for the Y(EDTA)−, Y(DCTA)− and Y(DTPA)2− chelates at 25°C and for the Y(HEDTA) chelate at 0°C, in 10−2 M acetate buffered solutions of 0·1 M ionic strength, are as follows: Rate = k 1 [ Y(EDTA) − ][ H + ] + k 2 [ Y(EDTA) − ][ H + ] 2 + k 3 [ Y(EDTA) − ][ H + ][ H(III) ] where, k 1 = 1·80×10 3 1. mole −1 min −1 ;k 2 = 3·14×10 7 1 2 . mole −2 min −1 ;k 3 = 2·34×10 5 1 2 . mole −2 min −1 . Rate = k 4 [ Y(DCTA) − ][ H + ] + k 5 [ Y(DCTA) − ][ Y(III) ] + k 6 [ Y(DCTA) − ] where, k 4 = 29·21. mole −1 min −1 ;k 5 = 7·6×10 −3 1. mole −1 min −1 ;k 6 = 4·0×10 5 min −1 . Rate = k 7 [ Y(DTPA) 2− ][ H + ] 2 , + k 8 [ Y(DTPA) 2− ][ H + ][ H(III) ] + k 9 [ Y(DTPA) 2− ][ Y(III) ] where, k 7 = 1·05×10 7 1 2 . mole −2 min −1 ;k 8 = 5·15×10 4 1 2 . mole −2 min −1 ;k 9 = 0·241. mole −1 min −1 . Rate = k 10 [ Y(HEDTA) ][ H + ] where k 10 = 4·3×10 3 1. mole −1 min −1 ;( at 0°C )" @default.
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- W2024553645 date "1971-06-01" @default.
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- W2024553645 title "A kinetic study of isotopic exchange reactions between yttrium ions and yttrium polyaminocarboxylic acid complex ions" @default.
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- W2024553645 doi "https://doi.org/10.1016/0022-1902(71)80607-3" @default.
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