Fundamental metal carbonyl equilibria: III. A quantitative study of the equilibrium between dirhodium octacarbonyl and TETRARHODIUM DODECACARBONYL (cas 19584-30-6) under carbon monoxide pressure. A correction☆

Add time:08/26/2019    Source:sciencedirect.com

Previously reported (J. Organomet. Chem., 246 (1983) 309) experimental data for the equilibrium constants and thermodynamic parameters of the reversible reaction 2 Rh2(CO)8 ⇄ Rh4(CO)12 + 4 CO have been re-evaluated using more reliable values for the solubility of carbon monoxide in hexane at lower than room temperature and introducing also a fugacity vs. pressure correction for carbon monoxide. The new values are: ΔH0 = 58.6 ± 10 kJ mol−1 and ΔS0 = 305 ± 25 J mol−1 K−1

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