Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - The hydrolysis of hydroxamic acid complexants in the presence of non-oxidizing metal ions 3
T2 - ferric ions at elevated temperatures
AU - Andrieux, Fabrice
AU - Boxall, Colin
AU - Steele, Helen
AU - Taylor, Robin
PY - 2014/3
Y1 - 2014/3
N2 - The hydrolysis of acetohydroxamic acid (AHA) was investigated both in the absence and presence of ferric ions at the range of temperatures (293–333 K). The data were then analyzed using a previously published mathematical model to determine the Arrhenius factor (A) and activation energy (Ea) of the hydrolysis reactions of free AHA and AHA bound to iron in the form of the monoacetohydroxamatoiron(III) complex. The Arrhenius factor and activation energy were found to be 4.24 9 109 dm3mol-1s-1 and 80.1 kJmol-1 respectively for the hydrolysis of free AHA in solution and 2.44 9 1011 dm3mol-1s-1 and 89.6 kJmol-1 respectively for the hydrolysis of ironbound AHA, suggesting a difference in the mechanism for the hydrolysis of the free and complexed ligand. This was further investigated using quantum mechanical calculations.
AB - The hydrolysis of acetohydroxamic acid (AHA) was investigated both in the absence and presence of ferric ions at the range of temperatures (293–333 K). The data were then analyzed using a previously published mathematical model to determine the Arrhenius factor (A) and activation energy (Ea) of the hydrolysis reactions of free AHA and AHA bound to iron in the form of the monoacetohydroxamatoiron(III) complex. The Arrhenius factor and activation energy were found to be 4.24 9 109 dm3mol-1s-1 and 80.1 kJmol-1 respectively for the hydrolysis of free AHA in solution and 2.44 9 1011 dm3mol-1s-1 and 89.6 kJmol-1 respectively for the hydrolysis of ironbound AHA, suggesting a difference in the mechanism for the hydrolysis of the free and complexed ligand. This was further investigated using quantum mechanical calculations.
KW - Acetohydroxamic acid
KW - Ferric ions
KW - Hydrolysis
KW - Kinetics
KW - High Temperature
KW - Quantum mechanical calculations
U2 - 10.1007/s10953-014-0142-y
DO - 10.1007/s10953-014-0142-y
M3 - Journal article
VL - 43
SP - 608
EP - 622
JO - Journal of Solution Chemistry
JF - Journal of Solution Chemistry
SN - 0095-9782
IS - 3
ER -