The volume is concerned exclusively with all the binary species formed between the elements silicon and fluorine such as SiF, SiF2, SiF3, SiF4, and Sif62-. Most of the volume, i.e. 144 pages, is devoted to the description of the well known physical and chemical properties of the SiF4 as well as to its preparation. This is followed in length by the report on SiF2 with its interesting chemistry, along with a section on the diatomic radical SiF. Species with fivefold and sixfold coordination of silicon are exemplified by SiF5- and by the well known SiF62-. Interestingly, the detailed models for describing the bonding situation in both ions are still a matter of discussion. While for Si2F6 most of the basic data are known, information on the chemical and physical properties of the higher members of the acylic perfluorosilanes, SinF2n+2, is scarce. All available information on the unstable cyclic perfluorosilanes of composition (SiF2)n and some even more exotic species is also included.
The volume provides complete and up-to-date information on the few chemical species composed of silicon, fluorine, and noble gases and in the major part on the species composed of silicon, fluorine, and hydrogen. Among the numerous experimentally confirmed and theoretically predicted monosilicon Si-H-F species with Si coordination numbers 2, 3, and 4, the most prominent and best investigated molecules by far are Si H3F, Si H2F2, and Si H F3. Even more has been reported about aqueous solutions of hexafluorosilicic acid, "H2Si F6", a system which is not yet completely understood. Some of the isomers of partially fluorinated di-, tri-, and tetrasilanes are known to some extent, but information on the higher acyclic and cyclic polysilanes is increasingly sparce.
Some years ago the Gmelin Institute started to supplement the volumes on halogens and halogen compounds. For the elements chlorine and fluorine these supplementary volumes have already been finished. For the element bromine the volume A 1 is also available. Now the volume B 1 will be published starting with the description of the compounds of bromine. The present volume describes the compounds of bromine with rare gases and with hydrogen. The volume is dominated by the description of HBr and its aqueous solution, hydrobromic acid. Chemical and physical properties of the diatomic molecule HBr are extremely well studied by modern methods. Thus detailed descriptions are given of gas-phase properties, spectra, and properties of condensed phases. Emphasis is laid on elementary reaction processes such as energy transfer and single reaction steps for HBr formation and decomposition. These studies have become classics of modern reaction kinetics. Likewise, elementary reactions of HBr and Br- with nonmetallic compounds are described comprehensively.
The volume provides complete and up-to-date information on the few chemical species composed of silicon, fluorine, and noble gases and in the major part on the species composed of silicon, fluorine, and hydrogen. Among the numerous experimentally confirmed and theoretically predicted monosilicon Si-H-F species with Si coordination numbers 2, 3, and 4, the most prominent and best investigated molecules by far are Si H3F, Si H2F2, and Si H F3. Even more has been reported about aqueous solutions of hexafluorosilicic acid, "H2Si F6", a system which is not yet completely understood. Some of the isomers of partially fluorinated di-, tri-, and tetrasilanes are known to some extent, but information on the higher acyclic and cyclic polysilanes is increasingly sparce.
The volume covers some 750 Si-F and Si(H)-F species which have additional bonds to oxygen, nitrogen, or both; O- and N-organylsubstituted derivatives and fluorosilicates are included. With Si coordination numbers ranging from two to six, the volume presents a broad spectrum of chemical topics. They extend from theoretical calculations on the stabilities and properties of the unstable SiFHO structural isomers, via preparative and structural results for penta- and hexacoordinated SiF4 adducts, to the use of fluoroalkoxysilanes in the formation of silicon films at low temperature, and the various methods of manufacturing (NH4)2SiF6. The physical properties of the ions in this salt were also studied at length.
The volume is concerned exclusively with all the binary species formed between the elements silicon and fluorine such as SiF, SiF2, SiF3, SiF4, and Sif62-. Most of the volume, i.e. 144 pages, is devoted to the description of the well known physical and chemical properties of the SiF4 as well as to its preparation. This is followed in length by the report on SiF2 with its interesting chemistry, along with a section on the diatomic radical SiF. Species with fivefold and sixfold coordination of silicon are exemplified by SiF5- and by the well known SiF62-. Interestingly, the detailed models for describing the bonding situation in both ions are still a matter of discussion. While for Si2F6 most of the basic data are known, information on the chemical and physical properties of the higher members of the acylic perfluorosilanes, SinF2n+2, is scarce. All available information on the unstable cyclic perfluorosilanes of composition (SiF2)n and some even more exotic species is also included.
This book is an excursion into the thoughts and experiences of two enterprising octogenarians: a German wife and her Texas husband. They return to Europe for one year of home exchanges with various partners in several cities and countries: Austria, France, Germany, and Poland. The correspondences are presented chronologically, paired with cultural insights, memories of the cities and villages as they were decades ago, and the new adventures they embark on with people they encounter and relatives they visit along the way. We promised our U.S. family we would write regular reports of our whereabouts and keep them informed of our activities abroad. We kept our promise over the months, and this notebook is the collection of letters and pictures from our stay overseas. The trip took place from autumn 2007 through autumn 2008.
Alliance of Enemies tells the thrilling history of the secret World War II relationship between Nazi Germany's espionage service, the Abwehr, and the American OSS, predecessor of the CIA. The actors in this great as-yet-untold story were often at odds with their respective governments. Working in the face of competing ideologies and at great personal risk, these unorthodox collaborators struggled to bring about an early peace. By mining secret World War II files that were only recently declassified, as well as personal interviews, diaries, and previously unpublished accounts to unearth some of history's surprises, Agostino von Hassell and Sigrid MacRae shed new light on Franklin Roosevelt's surprising stance toward Hitler before the U.S. entered the war, and on the relationship of American business to the Third Reich. They offer vivid details on the German resistance's desperate efforts to at first avert war and then to make common cause with enemy representatives to end it. And their work details the scope and depth of German resistance and its many plots to eliminate Hitler and why they failed. New names and incredible wartime plots reveal the titanic power struggles that took place in Istanbul and Lisbon---cities crawling with spies. Intense, clandestine communications and spy rings come clear, as do the self-serving neutrality of Switzerland and Portugal and the shocking postwar scramble for German spies, scientists, and more, all to aid in the fight against a new enemy: communism. Alliance of Enemies fills a huge void in our knowledge of the hidden, layered warfare---and the attempts for peace---of World War II. It will fascinate and excite historians, spy and policy enthusiasts, and anyone concerned with the uses of intelligence in trying times. Nowhere has such a complete and provocative history of the wars behind World War II been told---until now.
Although working on the sidelines of armed conflicts, physicians are often at the centre of attention. First Do No harm: Medical Ethics in International Humanitarian Law was born from the occasionally controversial role of physicians in recent armed conflicts and the legal and ethical rules that frame their actions. While international humanitarian, human rights and criminal law provide a framework of rights and obligations that bind physicians in armed conflicts, the reference to ‘medical ethics’ in the laws of armed conflict adds an extra-legal layer. In analysing both the legal and the ethical framework for physicians in armed conflict, the book is invaluable to practitioners and legal scholars alike.
Some years ago the Gmelin Institute started to supplement the volumes on halogens and halogen compounds. For the elements chlorine and fluorine these supplementary volumes have already been finished. For the element bromine the volume A 1 is also available. Now the volume B 1 will be published starting with the description of the compounds of bromine. The present volume describes the compounds of bromine with rare gases and with hydrogen. The volume is dominated by the description of HBr and its aqueous solution, hydrobromic acid. Chemical and physical properties of the diatomic molecule HBr are extremely well studied by modern methods. Thus detailed descriptions are given of gas-phase properties, spectra, and properties of condensed phases. Emphasis is laid on elementary reaction processes such as energy transfer and single reaction steps for HBr formation and decomposition. These studies have become classics of modern reaction kinetics. Likewise, elementary reactions of HBr and Br- with nonmetallic compounds are described comprehensively.
Grammatology of Images radically alters how we approach images. Instead of asking for the history, power, or essence of images, Sigrid Weigel addresses imaging as such. The book considers how something a-visible gets transformed into an image. Weigel scrutinizes the moment of mis-en-apparition, of making an appearance, and the process of concealment that accompanies any imaging. Weigel reinterprets Derrida’s and Freud’s concept of the trace as that which must be thought before something exists. In doing so, she illuminates the threshold between traces and iconic images, between something immaterial and its pictorial representation. Chapters alternate between general accounts of the line, the index, the effigy, and the cult-image, and case studies from the history of science, art, politics, and religion, involving faces as indicators of emotion, caricatures as effigies of defamation, and angels as embodiments of transcendental ideas. Weigel’s approach to images illuminates fascinating, unexpected correspondences between premodern and contemporary image-practices, between the history of religion and the modern sciences, and between things that are and are not understood as art.
The volume is concerned exclusively with all the binary species formed between the elements silicon and fluorine such as SiF, SiF2, SiF3, SiF4, and Sif62-. Most of the volume, i.e. 144 pages, is devoted to the description of the well known physical and chemical properties of the SiF4 as well as to its preparation. This is followed in length by the report on SiF2 with its interesting chemistry, along with a section on the diatomic radical SiF. Species with fivefold and sixfold coordination of silicon are exemplified by SiF5- and by the well known SiF62-. Interestingly, the detailed models for describing the bonding situation in both ions are still a matter of discussion. While for Si2F6 most of the basic data are known, information on the chemical and physical properties of the higher members of the acylic perfluorosilanes, SinF2n+2, is scarce. All available information on the unstable cyclic perfluorosilanes of composition (SiF2)n and some even more exotic species is also included.
Any practitioner, policymaker, or academic, in the field of competition law could hardly ask for a more thoroughly documented work. EC and US antitrust law is examined, and dozens of court decisions are quoted, with complete citations throughout. The books is a gold mine for anyone interested in the important task of extending the reach of competition law and antitrust law in this era of globalization."--BOOK JACKET.
The volume provides complete and up-to-date information on the few chemical species composed of silicon, fluorine, and noble gases and in the major part on the species composed of silicon, fluorine, and hydrogen. Among the numerous experimentally confirmed and theoretically predicted monosilicon Si-H-F species with Si coordination numbers 2, 3, and 4, the most prominent and best investigated molecules by far are Si H3F, Si H2F2, and Si H F3. Even more has been reported about aqueous solutions of hexafluorosilicic acid, "H2Si F6", a system which is not yet completely understood. Some of the isomers of partially fluorinated di-, tri-, and tetrasilanes are known to some extent, but information on the higher acyclic and cyclic polysilanes is increasingly sparce.
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