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Organic chemistry is constantly concerned with effecting reactions at a particular centre in a complex molecule, and if possible with a high and predictable level of stereoselectivity. In the light of much accumulated ex­ perience within organic chemistry it is usually possible to assess the likeli­ hood of alternative reaction pathways at least qualitatively. However, well based expectations can be falsified, and the experiments directed to the synthesis of vitamin B12 which led to Woodward's recognition of orbital symmetry control in organic chemistry are an instructive example. Our limi­ tations in this respect are very much accentuated in the case of hetero­ geneous reactions, which present additional problems, and except for very well studied instances, heterogeneous catalysis has remained a relatively empirical area of chemistry. Knowledge in this area has, however, been greatly improved by the development of transition metal complexes which replicate the catalytic properties of the metals, and are effective in a homo­ geneous reaction system. This development has advanced our understanding of catalysis by making it possible to interpret reactions in strictly molecular terms. In addition, these homogeneously active complexes are frequently more selective than their heterogeneous metallic counterparts either in discriminating between different functional centres in a molecule or in of­ fering better stereoselectivity. Homogeneous catalysts have now been devised for a number of organic chemical reactions, including hydrogenation, carbonylation, polymerisa­ tion, and isomerisation and dismutation of alkenes.

Unread book in perfect condition.

Contains solved-problems and summary theory of organic chemistry for chemistry majors, premedical students, and biologists. This edition follows recent trends in textbooks and includes topics such as homogeneous hydrogenation, C13NMR frontier orbital theory, phase transfer catalysis, regioselectivity, and asymmetric induction.

By January 1945, Upper Silesia had become Germany's key industrial region, with its coal mines, blast furnaces, arms factories and hydrogenation plants. Not surprisingly, when the Soviets launched a series of powerful offensives aimed at capturing the region, the German defence was bitter, bordering on the suicidal. Soviet reactions were brutal, the Red Army committing widespread atrocities, which have received little coverage until now. In this readable and fast-paced translation from the German edition, the author presents a penetrating description of the events which occurred in Silesia during the first five months of 1945 - from the massive Soviet offensive on 12th January, through to the final German defensive actions around Ratibor five months later.The translation and publication of Last Laurels represents a major contribution to the military history of the Eastern Front in the English language, filling a yawning gap in our knowledge of the most titanic armed struggle the world has yet seen.Key topics covered include: Prelude to the Soviet offensive / Opening of the Soviet Vistula-Oder offensive, 12 January 1945 / Initial German counter-attacks / Defence of Gleiwitz, Oppeln, and many other smaller locations recounted in detail / Eventual Soviet capture of the industrial district / Attack and counter-attack at Ratibor and the Glatzer Neisse / 1st Panzer Army's successful defence against Soviet attacks, February 1945 / German XI Corps counter-attacks / Soviet Schwarzwasser offensive, March 1945 / Decisive events in western Upper Silesia / The loss of Neisse and Leobschütz / Final Soviet offensive actions around Jägerndorf and Troppau.Main Selling Points -Contains a great number of German personal accounts Many small-unit actions recounted in detail Includes orders-of-battle for both German and Soviet forces