Equilibrium constants in decalin for the scrambling reaction (i) have been measured at 170-190 °C and over a wide range of concentrations. At 190 °C the average of 35 values for K is 2.13 ± 0.02, and [Mn<inf>2</inf>(CO)<inf>10</inf>] + [Re<inf>2</inf>(CO)<inf>10</inf>] ⇄ 2[MnRe(CO)<inf>10</inf>] (i), ΔH<sup>⊖</sup> and ΔS<sup>⊖</sup> are 34.4 ± 1.3 kJ mol<sup>-1</sup> and 80.3 ± 2.5 J K<sup>-1</sup> mol<sup>-1</sup>, respectively. The possible significance of these values is discussed together with the relationship between the value of ΔH<sup>⊖</sup> and various estimates of the absolute strengths of the individual metal-metal bonds.

Scrambling equilibria of some dimetal decacarbonyls

Marcomini, Antonio;
1984

Abstract

Equilibrium constants in decalin for the scrambling reaction (i) have been measured at 170-190 °C and over a wide range of concentrations. At 190 °C the average of 35 values for K is 2.13 ± 0.02, and [Mn2(CO)10] + [Re2(CO)10] ⇄ 2[MnRe(CO)10] (i), ΔH and ΔS are 34.4 ± 1.3 kJ mol-1 and 80.3 ± 2.5 J K-1 mol-1, respectively. The possible significance of these values is discussed together with the relationship between the value of ΔH and various estimates of the absolute strengths of the individual metal-metal bonds.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10278/3704025
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