Metal tellurides synthesis

In this edition, we have incorporated new material in all the chapters and updated references to the literature. New sections dealing with porous solids, fullerenes and related materials, metal nitrides, metal tellurides, molecular magnets and other organic materials have been added. Under preparative strategies, we have included new types of synthesis reported in the literature, specially those based on soft chemistry routes. We have a new section covering typical results from empirical theory and electron spectroscopy. There is a major section dealing with high-temperature oxide superconductors. We hope that this edition of the book will prove to be a useful text and reference work for all those interested in solid state chemistry and materials science. 

Eu—As system. — Brixner. [227] has reported the preparation of arsenides, antimonides and tellurides of the type MA (M = rare earths, Sc, Y and A = As, Sb, Te) and has studied the structural and electrical properties of these compounds. The compounds were prepared by direct synthesis from the elements in an argon atmosphere. All compounds possess a grey metallic appearance and crystallize in the NaCl structure. The following physical properties on EuAs and EuSb are available [227]. 

Hydrogen ligands, 689-711 Hydrogen selenide metal complexes, 663 Hydrogen sulfide metal complexes, 516 Hydrogen telluride metal complexes, 670 Hydroporphyrins, 814-856 basicity, 853 dehydrogenation, 853 demetallation, 854 deuteration, 853 mass spectra, 852 metallation, 854 NMR, 852 non-aromatic, 855 photochemistry, 854 redox chemistry, 855 synthesis, 852... 

Diorganyl tellurides are starting materials for the preparation of diorganyltellurium dihahdes, pseudohalides, and carboxylates, of telluroxides, and of teUuronium salts, and are used as ligands for the synthesis of transition metal complexes. 

Elemental tellurium reacts with organometallic compounds, i.e. RM, to furnish metal tellurolates (Scheme 15.19) these are widely used as useful sources of tellurium for synthesis of a variety of unsymmetrical tellurides [57]. 

Alkynyl(phenyl)iodonium salts have found synthetic application for the preparation of various substituted alkynes by the reaction with appropriate nucleophiles, such as enolate anions [980,981], selenide and telluride anions [982-984], dialkylphosphonate anions [985], benzotriazolate anion [986], imidazolate anion [987], N-functionalized amide anions [988-990] and transition metal complexes [991-993]. Scheme 3.291 shows several representative reactions the preparation of Ai-alkynyl carbamates 733 by alkynylation of carbamates 732 using alkynyliodonium triflates 731 [989], synthesis of ynamides 735 by the alkyny-lation/desilylation of tosylanilides 734 using trimethylsilylethynyl(phenyl)iodonium triflate [990] and the preparation of Ir(III) a-acetylide complex 737 by the alkynylation of Vaska s complex 736 [991]. 

The synthesis of nanostructured inorganic materials by sonochemical had already been synthesized a large number of nanostructures of different compositions with comparable or better than the properties of the same when summed with other preparation methods. The versatility of this method also extends to the relative flexibility of reaction conditions such as the nature of the precursors and their solutions, the possibility of addition of auxiliaries, and the presence of traps (species immobilized) to the nanoparticles. All types of metallic nanostructured materials synthesized by sonochemical described (powders, colloids, or nanoparticles supported) can also be obtained for other classes of compounds such as oxides [58-60], sulfides [61], Suslick [20, 62], and more recently selenides [63, 64] and tellurides [65]. 

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