Download or read book On the Collision Mechanism of Biomolecular Reactions Part III Investigations of the Reaction N2 H2 D2 to N2H H N2D D and CO H2 D2 to COH H COD D written by K. Lacmann and published by . This book was released on 1968 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: At moderate kinetic energies up to about 50 eV of the incident ion, the velocity spectra agree with the predictions of the stripping model. At higher energies, the bands of the product ions are shifted to somewhat higher velocities. This indicates preferential forward scattering of the charged reaction product and less conversion of kinetic energy of the incident ion into internal energy of the products. As was expected, the cross sections for the transfer of an H- and D-atom are equal at the same relative kinetic energy. Over a wide range of energy, the cross section depends on the relative kinetic energy as sigma = k1 . c to the ( -k2Es) power. Reactions could still be observed at relative kinetic energies, which are larger than the dissociation energy of the product ion (up to 7 eV for N2H(+) and N2D(+) and up to 10 eV for COH(+) and COD(+)). These details of the collision mechanism are tentatively explained by two hypotheses. (Author).
Download or read book On the Collision Mechanism of Bimolecular Reactions Investigations of the reaction N2 H2 D2 right arrow N2H H N2D D and CO H2 D2 right arrow COH H COD D written by A. Henglein and published by . This book was released on 1968 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Consolidated Translation Survey written by United States. Central Intelligence Agency. Foreign Documents Division and published by . This book was released on 1969 with total page 870 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the Collision Mechanism of Bimolecular Reactions written by K. Lacmann and published by . This book was released on 1968 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the Collision Mechanism of Bimolecular Reactions The stripping mechanism of the reactions Ar H2 D2 right arrow ArH H ArD D at energies 20 eV written by A. Henglein and published by . This book was released on 1968 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research and Development Reports Index written by and published by . This book was released on 1969 with total page 1012 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the Collision Mechanism of Bimolecular Reactions Part I Theory and Experimental Method for the Determination of the Velocity Spectrum of Products from Simple H Transfer Reactions of the Type X H2 to XH H written by A. Henglein and published by . This book was released on 1968 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: A simple apparatus is described which allows one to measure the velocity spectrum of the XH(+) or XD(+) ions, respectively, resulting from ion-molecule reactions of the type X(+) + H2(D2) forming XH(+) + H(XD(+) + D). The secondary ions are not accelerated after their formation. The incident X(+)-ions have kinetic energies between 20 and 200 cV. Furthermore, the velocity spectra are calculated which have to be expected for different collision models. (1) Complex model: All the atoms in the reactants participate in the collision. Every kind of collision between those limiting cases is conceivable, in which the relative kinetic energy of the reactants and the heat of reaction appear as internal energy of the product ion or as kinetic energy of both products (completely inelastic and elastic collision with atomic rearrangement, respectively). (2) Stripping model: The incident X(+)-particle hits only one atom of the hydrogen molecule in a completely inelastic collision without transfer of momentum to the second hydrogen atom. It is also shown that the cross section of the reaction becomes zero above a certain energy of the incident ion. This critical energy depends on the collision mechanism. It can be measured with the apparatus described. In addition an isotope effect of the order of 2 with respect to the critical energy is expected from the transfer of an H or D atom, respectively.
Download or read book Combustion written by J. Warnatz and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a rigorous treatment of the coupling of chemical reactions and fluid flow. Combustion-specific topics of chemistry and fluid mechanics are considered and tools described for the simulation of combustion processes. This edition is completely restructured. Mathematical Formulae and derivations as well as the space-consuming reaction mechanisms have been replaced from the text to appendix. A new chapter discusses the impact of combustion processes on the atmosphere, the chapter on auto-ignition is extended to combustion in Otto- and Diesel-engines, and the chapters on heterogeneous combustion and on soot formation are heavily revised.
Download or read book On the Collision Mechanism of Bimolecular Reactions Part II The Stripping Mechanism of the Reactions Ar H2 D2 to ArH H ArD D at Energies 20 EV written by K. Lacmann and published by . This book was released on 1968 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The bands of ArH(+) and ArD(+) ions have been observed in the velocity spectra of the ions resulting from the interaction (chemical reaction and scattering) of Ar(+) ions with H2 and D2, respectively. The bands are practically located as it is expected from the stripping model. It is concluded that the Ar(+) ion does not collide with the whole hydrogen molecule in a completely inelastic manner as it is the case at low kinetic energies, where the polarization theory of ion-molecule reactions is applicable. The Ar(+) ion interacts only with the captured hydrogen atom without transfer of momentum to the second atom. The critical energies of the incident Ar(+) ions, above which the cross sections of the two reactions are zero, differ by a factor of about 2 and agree with the energies calculated from the stripping model. In addition, some minor deviations from the stripping model are mentioned. (Author).
Download or read book On the Collision Mechanism of Bimolecular Reactions written by A. Henglein and published by . This book was released on 1968 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: A simple apparatus is described which allows one to measure the velocity spectrum of the XH(+) or XD(+) ions, respectively, resulting from ion-molecule reactions of the type X(+) + H2(D2) forming XH(+) + H(XD(+) + D). The secondary ions are not accelerated after their formation. The incident X(+)-ions have kinetic energies between 20 and 200 cV. Furthermore, the velocity spectra are calculated which have to be expected for different collision models. (1) Complex model: All the atoms in the reactants participate in the collision. Every kind of collision between those limiting cases is conceivable, in which the relative kinetic energy of the reactants and the heat of reaction appear as internal energy of the product ion or as kinetic energy of both products (completely inelastic and elastic collision with atomic rearrangement, respectively). (2) Stripping model: The incident X(+)-particle hits only one atom of the hydrogen molecule in a completely inelastic collision without transfer of momentum to the second hydrogen atom. It is also shown that the cross section of the reaction becomes zero above a certain energy of the incident ion. This critical energy depends on the collision mechanism. It can be measured with the apparatus described. In addition an isotope effect of the order of 2 with respect to the critical energy is expected from the transfer of an H or D atom, respectively.
Download or read book Bimolecular Collisions written by M. N. R. Ashfold and published by . This book was released on 1989 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed to provide an authoritative and timely review of advances in the field of gas-phase photochemistry and kinetics, this volume contains a collection of papers on biomolecular collisions. Contributors discuss collision processes, reactive processes and association reactions.
Download or read book Modern Coordination Chemistry written by G. J. Leigh and published by Royal Society of Chemistry. This book was released on 2002 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Joseph Chatt was a pioneering figure in coordination chemistry. Intended as a record of Chatt's life, work, and influence, this book begins with a description of Chatt's career presented by co-workers, contemporaries, and students, then goes on to show that many of today's leading practitioners in the field have been influenced by Chatt. The latest research in coordination chemistry is presented to highlight Chatt's continuing legacy, in sections on the synthesis and reactivity of hydrido and dihydrogen complexes, the chemistry of phosphines, transition metal complexes of olefins and related isolobal ligands, chemistry related to dinitrogen complexes, the biological work of the ARC unit of nitrogen fixation at the University of Sussex, and patterns and generalizations in stability and reactivity. Leigh is affiliated with the University of Sussex, UK, and Winterton is affiliated with the University of Liverpool, UK. The book is distributed in the US by Springer Verlag. Annotation copyrighted by Book News Inc., Portland, OR.
Download or read book Optical Spectroscopic and Microscopic Techniques written by Harekrushna Sahoo and published by Springer Nature. This book was released on 2022-02-25 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book illustrates the significance of various optical spectroscopy and microscopy techniques, including absorption spectroscopy, fluorescence spectroscopy, infrared spectroscopy, and Raman spectroscopy for deciphering the nature of biological molecules. The content of this book chiefly focuses on (1) the principle, theory, and instrumentation used in different optical spectroscopy techniques, and (2) the application of these techniques in exploring the nature of different biomolecules (e.g., proteins, nucleic acids, enzymes, and carbohydrates). It emphasizes the structural, conformational and dynamic, and kinetic including the changes in biomolecules under a range of conditions. In closing, the book summarizes recent advances in the field of optical spectroscopic and microscopic techniques.
Download or read book The Molecular Universe IAU S280 written by José Cernicharo and published by Cambridge University Press. This book was released on 2012-01-19 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Astrochemistry, the study of molecules and their chemistry in astrophysical objects throughout the Universe, is experiencing a true golden age. Astronomical observations of molecules are crucial in contributing to our understanding of the physical conditions in many different astrophysical environments, from the Solar System and extrasolar planets to stars, interstellar clouds and galaxies. Concurrently, laboratory experiments and theoretical studies can provide basic information about the often exotic chemical processes taking place in the Universe. IAU Symposium 280 contains outstanding reviews on the advances in observational, laboratory, theoretical and modelling studies, carried out by leading scientists worldwide. This volume provides researchers and graduate students with an indispensable account of the current state of astrochemistry, its recent successes and the immense possibilities of this fascinating field for future growth.
Download or read book Chemistry written by Thomas R. Gilbert and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "A research-based text and assessment package that helps students visualize chemistry as they solve problems. The exciting NEW Sixth Edition expands on the visualization pedagogy from coauthor Stacey Lowery Bretz and makes it even easier to implement in the classroom. Based on her chemistry education research on how students construct and interpret multiple representations, art in the book and media has been revised to be more pedagogically effective and to address student misconceptions. NEW projected visualization questions help instructors assess students' conceptual understanding in lecture or during exams. A NEW Interactive Instructor's Guide provides innovative ways to incorporate research-based active learning pedagogy into the classroom"--
Download or read book Metal Interactions with Boron Clusters written by Russell N. Grimes and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular clusters, in the broad sense that the term is commonly understood, today comprise an enormous class of species extending into virtually every important area of chemistry: "naked" metal clusters, transition metal carbonyl clusters, hydrocarbon cages such as cubane (C H ) and dodecahedrane (C H ), 8 8 20 20 organometallic cluster complexes, enzymes containing Fe S or MoFe S 4 4 3 4 cores, high polymers based on carborane units, and, of course, the many kinds of polyhedral borane species. So large is the area spanned by these diverse classes that any attempt to deal with them comprehensively in one volume would, to say the least, be ambitious-and also premature. We are presently at a stage where intriguing relationships between the various cluster families are becoming apparent (particularly in terms of bonding descriptions), and despite large dif ferences in their chemistry an underlying unity is gradually developing in the field. For example, structural changes occurring in Fe S cores as electrons are 4 4 pumped in and out, in some measure resemble those observed in boranes and carboranes. The cleavage of alkynes via incorporation into carborane cages and subsequent cage rearrangement, a sequence familiar to boron chemists, is a thermodynamically favored process which may be related to the behavior of unsaturated hydrocarbons on metal surfaces; analogies of this sort have drawn attention from theorists and experimentalists.
