ammonium carbonate: (NH4)2CO3, with NH4+ and CO32- ions Although they consist of positively and negatively charged ions, ionic compounds are electrically neutral, because the charges are always equal and opposite. (The other major group of compounds is molecular compounds: these consist of mo...
compounds是化合物,mixtures是混合物,化合物是纯净物,而混合物不是纯净物,如H2O是compound,而盐水是mixture
(1991) Actinide elements and their compounds with other elements, part 1, in Landolt-Börnstein Group III: Condensed Matter Volume 19 Magnetic Properties of Metals Subvolume F1 (ed. H. P. J. Wijn), Springer-Verlag, Berlin.Troc, R. and Suski, W. (1993) Actinide elements and their ...
Three-membered ring systems containing heavier main group elements and almost every combination of elements can now be prepared. The isolobal analogy between C+ and B makes three-membered rings containing boron especially interesting for both theoreticians and synthetic chemists. With the synthesis of...
Direct reaction of sulfur with [2,4,6-{CH(SiMe3)2}3-C6H2](mes)MH2(M=Ge, Sn) gives thetetrasulfurring compounds which are converted to the germa- or stannathione on heating.365–367The germanium complex (R)(mes)GeS4reacts further with Ph2CN2to give (R)(mes)Ge(S4CPh2) and tw...
More precisely, investigating the internal structure of compounds, the kinds of elements they are composed of, their interpretation, and grammatical behaviour. Subsequently, three major categories of compound nouns will be discussed. They are the so-called endocentric, exocentric, and copula compounds....
Compounds of Group 14 Elements with an Element–Element (E = Si, Ge, Sn) Bond: Effect of the Nature of the Element Atom 来自 ACS 喜欢 0 阅读量: 8 摘要: Two series of germanium compounds, ( p -Tol) 3 Ge-MMe 3 (M = Si ( 1 ), Ge ( 2 ), Sn ( 3 )) and (Me 3 Si) ...
Dioxin is a heterocyclic organic, non-aromatic compound with the chemical formula C4H4O2. It exists in two isomerc forms: 1,4-dioxin (or p-dioxin) and 1,2-dioxin (or o-dioxin); the latter is quite unstable due to irs peroxide-like characteristics. The term “dioxins” is most commonly...
with NG atoms, the average distance between A and B must increase, increasing the Madelung energy. As a result, the products of AB-type compounds and NG elements will be less stable than the separated phases. On the other hand, for 1D ionic compounds with 2:1 ratio (A2B type), the ...
Solid at room temp (except Hg) • Lustrous • Good conductors • Malleable • Ductile • High melting point • High density • Don’t commonly combine with other metals but when they do, they form alloys • Commonly combine with nonmetals to form minerals, chlorides, oxides and...