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• W1978151954 abstract "Abstract The highly reactive mixed metal cluster Co 2 Rh 2 (CO) 12 has been shown to undergo selective disproportionation under hydrogen according to 3Co 2 Rh 2 (CO) 12 → 2Co 3 Rh(CO) 12 +Rh 4 (CO) 12 . The reaction, which may be classified as an intermolecular redistribution reaction, was carried out in n-hexane at T = 275–294 K and P H2 = 0.4–1.0 MPa and studied by use of high pressure in situ infrared spectroscopy. No reaction intermediates were observed. The reaction has an order of 1.0±0.1 with respect to hydrogen and is second order in the metal carbonyl cluster Co 2 Rh 2 (CO) 12 , it has an apparent activation energy E a of 55±8 kJ/mol (13±2 kcal/mol). The low activation energy suggests that the rate-limiting step may not be the activation of molecular hydrogen. Furthermore, the second order dependence of the rate on the concentration of Co 2 Rh 2 (CO) 12 is very unusual for a cluster fragmentation reaction. Possible mechanisms giving rise to the observed kinetics are discussed." @default.
• W1978151954 created "2016-06-24" @default.
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• W1978151954 date "1991-10-01" @default.
• W1978151954 modified "2023-09-29" @default.
• W1978151954 title "Kinetics of dihydrogen activation by Co2Rh2(CO)12 disproportionation and a second order cluster fragmentation" @default.
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• W1978151954 doi "https://doi.org/10.1016/0022-328x(91)80166-h" @default.
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