Advances in Catalysis, Vol. 16 by D.D. Eley, Herman Pines, Paul B. Weisz (Eds.)

By D.D. Eley, Herman Pines, Paul B. Weisz (Eds.)

(from preface)The airplane, the printing plant, and the meteorological station, are each one platforms containing many machines. The mode of co-action is sort of complicated and intensely specific—in every one case reaching a selected over-all outcome. to check or describe anyone of those platforms, we might continue to research this complexity of interplay by way of taking with no consideration the ''simple'' life of the weather corresponding to the airplane engine, the printing desktop, the chronometer, and so on. after all, each one of those is itself a classy mechanism, containing many ''simpler'' parts, like wheels, rods, pulleys, and so on. To a wide volume the weather should not multiple, however the mode of interaction is back complicated, and differs in each one laptop in attaining its particular aim.

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5511, the isomerization was carried out with 1-octene labeled in the 3 position, C,H,,CD,CH=CH,. The 2-octene isolated was not labeled in the methyl group. Hence, Eq. H C T C,H,,CH,CH-CH,-C~H,,HC~~+CCH, Pd Pd H / - A c,H,,cH,cH-CH, L/ J d - C,H,,CH-CHCH, T Pd \ C,H,,CH-CHCH, f Pd (54) C,H,,CH=CHCH, (55) (54) is improbable but Eq. ( 5 5 ) is consistent with the data. Positive direct proof of deuterium incorporation at carbon-2 was not obtained, C I however. Isomerization of C-C-C-C=C was also attempted with the palladium catalyst under conditions which isomerized 1-octene.

Sor. Japan 37, 181 (1964). 26. Whitlock, H. ,J. A m . Chem. Soe. 85,2344 (1963). 27. , and Stettiner, H. M. , J. A m . Chem. Sor. 71, 3035 (1949). 28a. Sternberg, H. , J . A m . Chem. S o r . 78, 5704 ( 1 956). 2Rb. Sternberg, H. , J. A m . Chem. S o r . 79, 61 16 (1957). ). , Ber. 88, 445 (1955). 30. , J. Org. Chem. 27, 3941 (1962). 3 1 . Emerson, G. , J. A m . Chem. Soe. 84, 4591 (1962). 32. , and Emerson, G. , Advan. Organometallic Chem. 1, 16 (1964). 33. , private communication. 34. King, R.

6 mole yo Fe,(C0)12the equilibrium mixture of hexenes was obtained, but, after 19 hours of refluxing cis-2-hexene under the same conditions, only about 12% conversion of cis-2-hexene was obtained. The slow step seems to be the initial n-complexing and Manuel suggests that isomerization occurs within the complexed species without liberation of the intermediate olefins. Basically, two mechanistic paths were suggested for the isomerization, both involving carbonyl hydride intermediates. The first of these has been represented: Although the reaction responsible for the generation of the hydride is not specified,it is assumed that it arises from a disproportionation of iron carbonyl complexes.

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