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Title: Kinetics and mechanism of the reaction of hydroxopentaaquarhodium(III) ion with L-aspartic acid in aqueous media
Authors: Mohanty, S
Anand, S
Mohanty, P
Issue Date: Jun-2002
Publisher: NISCAIR-CSIR, India
Abstract: The kinetics of the reaction of L-aspartic acid (H3L+) with hydroxopentaaquarhodium (III) has been studied over the range 2.58≤103[H3L+] ≤ 12.90, 3.49 ≤pH≤ 4.3, 50°≤ t ≤65 °C and I=0.1mol dm-3(NaClO4).The reaction takes place via an outer sphere association between RhOH2+ and (H3L+) followed by transformation of the outer into an inner-sphere complex (chelate is formed) by slow interchange. The anation rate constant RhOH3+ at 25°C and I= 0.1mol dm- (NaClO4) is found to be 2.2×10-6s-l. ΔH# and ΔS# for kan path are found to be 62.0±1.2 kJ mol-1 and -120.8 ±3.4 JK-1mol-1 respectively. Anation reaction of RhOH2+ follows an Ia path.
Page(s): 1191-1194
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.41A(06) [June 2002]

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