Rate laws acetaldehyde formation

We said that if n = 1, the reaction was first-order with respect to A if n = 2, the reaction was second-order with inspect to A and so on. However, a large number of homogeneous reactions involve the formation and subsequent reaction of an intermediate species. When this is the case it is not uncommon to find a reaction order that is not an integer. For example, the rate law for the decomposition of acetaldehyde,... 

However, a series of papers by Henry have established that Cl and CuClj do not trap the same intermediate that leads to the formation of acetaldehyde. In the presence of high concentrations of chloride, the hydroxyalkyl intermediate contains chloride instead of hydroxide within the coordination sphere of the metal, and the hydroxyalkyl intermediate is stabilized toward p-hydrogen elimination. The fonnation of ethylene chlorohydrin is favored at high [CT] because its rate law is inverse first order in Cl (Equation 16.101), whereas oxidation to form aldehyde is inverse second order in Ch... 

For the kinetics of acetaldehyde [55] formation from methanol and syngas with Co/I/PR3-catalysts the following rate law was observed ... 

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