منابع مشابه
Some problems of nitroxyl chemistry*
The development of chemistry of free nitroxyl radicals puts a number of new problems before the researchers. It is possible to subdivide nitroxyl radicals into two independent groups: nitroxides and iminoxyls. due to pronounced difference in their reactivity. To specify the concept of stability of a substance it is necessary to reconsider the ideas concerning the discovery of the first stable f...
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In the original paper, Goldman et al. (2000) launched the study of the inverse problems in combinatorial chemistry, which is closely related to the design of combinatorial libraries for drug discovery. Following their ideas, we investigate four other topological indices, i.e., the sigma-index, the c-index, the Z-index, and the M(1)-index, with a special emphasis on the sigma-index. Like the Wie...
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Chromium, named for its many-colored compounds, exists in the oxidation states of -2 to +6 inclusively. The compounds exhibit a wide range of geometries including square planar, tetrahedral, octahedral, and various distorted geometries. Chromium is found in nature principally as the chromite ore FeCr2O4 in which chromium is in the +3 state. The existence of a particular oxidation state is depen...
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Introduction In general, the twentieth century marked the first major incursion of chemists into the world of tribology. Driven partly by the need for improved lubricants for new machines developed in the first few decades of the century, and partly by new analytical capabilities, lubricant chemists and tribochemists were to become full partners in the science of tribology. In this review we co...
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Although surfaces or, more precisely, the surface atomic and electronic structure, determine the way materials interact with their environment, the influence of surface chemistry on the bulk of the material is generally considered to be small. However, in the case of high surface area materials such as nanoporous solids, surface properties can start to dominate the overall material behavior. Th...
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ژورنال
عنوان ژورنال: Canadian Journal of Chemistry
سال: 1955
ISSN: 0008-4042,1480-3291
DOI: 10.1139/v55-020