Fe2 MoO

Figure 11. Ratio of CH3OCH3 to CH20 produced on 0.3 g of Fe2(MoO,)3. Key X, CD3OD A, CHsOD and, CH3OH.

Cr CMoO ) in Fe2(MoO ) by a) analytical electron microscopy and b) atomic absorption spectroscopy. 

According to the model presented (60), the catalyst particle should contain an inner core consisting of a -MMoO structure, covered by Fe2(MoO )2, with the outer shell of 100 A thickness containing Bi MoO and Bi2(MoO ). In used catalysts, all the results confirm the presence or 3 FeMoO. ... 

Clearly kinetics alone will not distinguish the two schemes. To gain this distinction one can deliberately add a reagent that, judging from its independent chemistry, will react with one of the possible chain-carrying radicals. If the suspected radical is indeed an intermediate, and it reacts with the addend, the overall reaction will be slowed or halted. The added substance is a chain-breaker. In this case Fe2+ and Cu2+ (separately) were added. The first of these would very likely react with either of the peroxyl radicals, ROO or MOO. Indeed, Fe2+ dramatically inhibits the reaction. This evidence confirms the chain nature of the process, but does not distinguish between the mechanisms since both ROO and MOO would be scavenged by Fe2+. 

Composition Fe2(Mo04)3 No free Fe203 Slight excess MoOs Pine silver... 

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