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 kind of complicated and intensely specific—in every one case reaching a selected over-all end result. to review or describe anyone of those structures, we may possibly continue to investigate this complexity of interplay via taking without any consideration the ''simple'' life of the weather resembling the airplane engine, the printing laptop, the chronometer, and so on. in fact, each one of those is itself a sophisticated mechanism, containing many ''simpler'' parts, like wheels, rods, pulleys, and so forth. To a wide quantity the weather will not be distinct, however the mode of interaction is back complicated, and differs in each one laptop achieve its particular aim.

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Dimethyl. Dimethyl. pentanol ................ IX Conclusions ....................................................... References ........................................................ . . . . . . 50 50 52 56 56 58 69 59 62 63 66 68 70 71 71 72 74 74 83 83 85 89 89 90 1. Introduction Although the dehydration of ethanol over alumina was discovered in 1797 ( I ) . 3). Much of the experimental material is 49 50 HERMAN PINES AND JOOST MANASSEN difficult t o interpret for three reasons: (i) the earlier workers did not realize the importance of the chemical nature of the alumina used; (G) analytical techniques lacked present-day precision; (iii) alcohols used were not broad enough to provide a base for understanding the mechanism of dehydration.

Purpose .......................................................... I11. Early Mechanisms and Observations .................................. I Introduction . Page 49 IV Nature of Alumina Catalysts ........................................ V Isomeriaation Following Dehydration .................................. A. Cyelohexanol ................................................... B I-Butanol ..................................................... VI Steric Course of Dehydration ........................................

The exact role of Pd in the migration has not yet been elucidated. It seems almost certain that the phenomenal interest in the whole area of transition metal isomerization in the last several years will be more than matched by the wealth of work that is certain to pour out of research laboratories in the next few years. ACKNOWLEDGMENT The author is grateful to Drs. W. Clement, J. Kwiatek, I. Mador, and L. Roos for criticisms end helpful discussions and to Sharon Butryrnowicz for help with the manuscript.

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