Abstract
1H NMR spectroscopy has been used to study the kinetics and equilibrium properties of solutions, in acetone, made of (CF 3CO 2) 4Mo 2 and (HCO 2) 4Mo 2. At equilibrium all of the mixed ligand species, (CF 3CO 2) 3(HCO 2)MO 2, cis- and trans-(CF 3CO 2) 2(HCO 2)MO 2, and (CF 3CO 2)(HCO 2) 3Mo 2, are formed, as well as the end members. The distribution shows almost no significant deviations from that expected statistically, the main one being in a cis/trans ratio in the 2:2 species that is about 2.5 instead of 2.0. At 21°C, equilibrium was attained too rapidly (< 1 h) to permit a detailed rate study but at 10°C and 0°C the growth and decay of the various species was easily followed over 3–5 h periods. The rate behaviour is qualitatively reasonable, but a quantitative kinetic analysis was not undertaken.
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