J. Dolieslager et al., KINETICS OF THE FORMATION, AND OPTICAL-ABSORPTION STUDY OF [IRCL5(CH3CN)](2-) IN SOLUTION, Polyhedron, 17(10), 1998, pp. 1773-1778
In this paper the kinetics of the reaction of [IrCl5(H2O)](2-) with CH
3CN has been studied. The reaction product was isolated and identified
as K-2[IrCl5(CH3CN)]. 2H(2)O. The experimental rate constants show no
constant order with respect to the acetonitrile concentration. A pref
erential solvation of [IrCl5(H2O)](2-) by acetonitrile in water-aceton
itrile mixtures is suggested to explain the data. The obtained optical
absorption spectra of [IrCl5(CH3CN)](2-) are in good agreement with d
ata already published, but another interpretation is given for the obs
erved d-d transitions. The low energy transition at about 24,000 cm(-1
) is predicted to be a singlet-singlet transition ((1)A(2) <-- (1)A(1)
), and not a singlet-triplet transition as proposed in other work. (C)
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