Abstract
The kinetic behavior of the reaction between dihalodicarbonylrhodate(I) anions, [RhX 2(CO) 2] −1, where X = Cl, Br, and the chelating agent 2-aminopyridine was investigated spectrophotometrically. The reaction for both halo analogues was found to obey third order kinetics, first order in the complex anion and second order in the 2-aminopyridine concentrations. The third order rate constants for the chloro and bromo complex anions had the values, at 25°C, of 779 and 156 l 2 mol −2 min −1, respectively, and the corresponding activation energies were 3.00 and 5.50 Kcal mol −1. A mechanism is proposed to account for these observations.
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