The penetration of interstitial elements in transition metals is analysed in terms of the strain and electronic interaction energies between solvent and solute atoms. The strain-energy term is related to the size of the interstitial site and is a function of crystal structure (fcc or bcc), while...
这种相似性得到了最近的工作的支持,许多新的化合物与小分子如H2,NH3,C2H4在温和的条件下反应,在催化领域应用方面表现出一定的潜力。 Figure 1 Similarity of H2 interactions with main-group and transition-metal compounds. 上图说的是H2和主族元素以及过渡金属反应的相似性。a中H2的p (HOMO) 和ArMMAr (M=Ge...
Transition Metals: Definition For an element to be considered a transition metal, its location is truly the defining point. Any element in groups 3 through 12 gets the label. These elements are referred to as transition metals because they serve as the area where elements transition from metals...
What Are Transition Metals? Transition metals are the elements of the 10 columns in groups 3 through 12. They can be found at the center of the periodic table, in the shorter columns between the eight tall columns of the main group elements. Transition Metals: Definition For an element to ...
化学里的元素(element)基本可以分成 metal(金属) 与 nonmetal (非金属) 两类,金属元素又有一系列特别的 transition metals(过渡金属)。周期表上金属与非金属交界处又有着一系列具有特殊性质的元素,被称为 metalloid(准金属) 或 semimetal(半金属X。 以下是几种常见元素信息名称的中英对照: ...
metalloidsoftenbehavechemicallylikenon-metals,butarelustrouslikemetals.6)ThegroupAelements(IA,IIA,IIIA,etc.)aresometimescalledcollectivelytherepresentativeormain-groupelements.7)ThegroupBelementsarecalledthetransitionmetals.TheElementsinNatureMostelementsarenotfoundpureinnature,butrathercombinedchemicallywithother...
Balancing the atomic waistline: Isodensity‐based scrf radii for mainゞroup elements and transition metals 来自 Wiley 喜欢 0 阅读量: 61 作者:JY Tao,WH Mu,GA Chass,TH Tang,DC Fang 摘要: The enthalpies of dilution of aqueous solutions of N-acetyl-N′-methyl-l-glycinamide (AcGlyNHCH3), N...
Secondly, the introduction of dopants can affect the size of the pristine-crystal structure, which may result in higher specific surface areas and thereby enhance the sensing properties [39,46]. Thirdly, expected as effective catalysts, transition metals such as Fe, Co and Ni enable to promote ...
Multiple bonds between transition metals and main-group elements. 73. Synthetic routes to rhenium(V) alkyl and rhenium(VII) alkylidyne complexes. X-ray crystal structures of (.eta.5-C5Me5)Re(:O) (CH3)[CH2C(CH3)3] and (.eta.5-C5Me5)(Br)3R... Multiple bonds between transition ...
Organic-inorganic hybrid chains and layers constructed from copper-amine cations and early transition metal (Nb, Mo) oxyfluoride anions. Under hydrothermal conditions in HF-containing media, the combination of early (Nb5+, Mo6+) and late (Cu2+) transition metals with four different organic a.....