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Title: Ternary complexes of iron(III) with 1, 2-bis(2-hydroxybenzamido)ethane, thiocyanate and sulphur(IV): A kinetic study.
Authors: Rath, Harapriya
Dash, Anadi C
Issue Date: Aug-2002
Publisher: NISCAIR-CSIR, India
Abstract: The kinetics of anation of (diaqua)(1,2-bis(2-hydroxybenzamido)iron(III) by NCS¯ and SIV (HSO3¯ and SO32- ) are reported at 25°C, I= 0.5 mol dm-3 in 20% (v/v) MeOH + H2O medium. The formation of the monothiocyanato complex, Fe(L)(OH2)(NCS), is reversible. The monosulphito complex, Fe(L)(OH2)(SO3)¯ is formed via the reaction of the diaqua complex with H SO and SO32 - ; dissoc iation of the sulphito complex to the reactants has not been observed. Ion-pairing of the diaqua complex with SO32 - (but not with HSO) has been identified kinetically and resulted in the reduced reactivity of SO32 - in comparison to HSO. The results are consistent with the dissociative mode of activation for the aqua ligand substitution of Fe(L)(OH2)2+. It has been found that there is no significant labilising action of the coordinated phenoxide and amide functions of the primary ligand (L2-) on the aqua ligand replacement reaction at iron(III) center.
Page(s): 1600-1603
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.41A(08) [August 2002]

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