Chemistry of the Heaviest Elements - - One Atom at a Time
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منابع مشابه
Chemistry of superheavy elements.
The number of chemical elements has increased considerably in the last few decades. Most excitingly, these heaviest, man-made elements at the far-end of the Periodic Table are located in the area of the long-awaited superheavy elements. While physical techniques currently play a leading role in these discoveries, the chemistry of superheavy elements is now beginning to be developed. Advanced an...
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Elements 112 through 118 are expected to be very volatile. Early extrapolations of the sublimation enthalpies, ∆Hsub=∆Hf(g), of the solid state in groups 12 through 17 have indeed shown the lowest ∆Hsub for the heaviest elements in each group of the elements, respectively [1,2]. (The gas-phase chemistry experiments give ∆Hsub as a measure of volatility of an element using measured ∆Hads on meta...
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For the first time B-podands have been studied as an efficient and powerful catalysts in the ring opening of epoxides with azide anion in water. The reaction afforded the corresponding 1,2-azidoalcohols with high regioselectivity under mild reaction conditions and in a highly atom economic fashion.
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For the first time B-podands have been studied as an efficient and powerful catalysts in the ring opening of epoxides with azide anion in water. The reaction afforded the corresponding 1,2-azidoalcohols with high regioselectivity under mild reaction conditions and in a highly atom economic fashion.
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The generalized atom-bond connectivity index of a graph G is denoted by ABCa(G) and defined as the sum of weights ((d(u)+d(v)-2)/d(u)d(v))aa$ over all edges uv∊G. A cactus is a graph in which any two cycles have at most one common vertex. In this paper, we compute sharp bounds for ABCa index for cacti of order $n$ ...
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