To compare the uniformity of chemical environments with a “nonencapsulating” metal-silicon nanocluster, we chose TaSi8+; eight Si atoms insufficient to encapsulate a Ta atom51. Accordingly, TaSi8+cations were deposited onto a C60substrate (Supplementary Figure5), using MSP conditions that slightly...
Reactivity Trend in the Periodic Table The organization of elements on theperiodic tableallows for predictions concerning reactivity. Both highly electropositive and highlyelectronegative elementshave a strong tendency to react. These elements are located in the upper right and lower left corners of the ...
Several examples were noted whereby the trend in the rates of reaction was just the opposite of that which would be expected if one assumed that a higher calculated S–metal bond strength would lead to higher reactivity (4, 89, 99). For example, even with very reactive bimetallic cluster ...
phenolic moiety of substrate 7 would be deprotonated and exist as an anionic form (i.e., 7) under kinetic conditions, the ground-state stabilization of 7 through formation of a six-membered cyclic complex with M+ (i.e., 8) is proposed to be responsible for the decreasing k obsd trend...
Generally, the formation of tetrahydro-β-carboline-3-carboxylic acid compounds from tryptophan and a carbonyl produces both possible diastereomers, often with one in excess, though there is no specific trend and this is dependent on the starting carbonyl. It has been shown that for some carbonyls...
influence the internal energy. Lastly, for ionic compounds consisting of heavier ions, such as CaF2, the change of the internal energy may have a turning point and again increase with pressure, opposite to the trend of the Madelung energy. This counteracting factor will be discussed in detail ...
contrast, the reactivity series is aqualitative measureof reactivity. The major disadvantage of using standard electrode potentials is that they only apply to aqueous solutions understandard conditions. Under real-world conditions, the series follows the trend potassium > sodium > lithium > alkaline ...
Therefore, N could reasonably characterize the evolution of char microstructure, and reasonably predicted the change trend of reactivity parameters (R0.5, R0.8, and R0.9) under the experimental conditions. However, coal char is a typical example of highly heterogeneous and complicated material, and ...
However, rutile exhibits the reverse trend; negative charge density increases from RbCl < KCl < NaCl < LiCl [9,10,11,12]. Flow microcalorimetry measurements investigating the heats of adsorption and exchange of the alkali cations at silica–and rutile–water interfaces also show regular and ...
α value of Ar, intermediate between that of He and Rn, is proper to exalt the change of the atomic size along the ArHe→ArRn series (as shown in the top right panel of Figure 1), thus rationalizing the trend of the equilibrium distances ratio, while the highest α...