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Tungsten hexachloride is an inorganic chemical compound of tungsten and chlorine with the chemical formula W Cl 6. This dark violet-blue compound exists as volatile crystals under standard conditions. It is an important starting reagent in the preparation of tungsten compounds. [1]
A hexachloride is a compound or ion that contains six chlorine atoms or ions. It is the highest chloride that an element can form. Common hexachlorides include: Molybdenum hexachloride, MoCl 6; Tungsten hexachloride, WCl 6; Rhenium hexachloride, ReCl 6; Uranium hexachloride, UCl 6; Some hexachloroanions are also known: Hexachloroaluminate [AlCl ...
The material is prepared by reduction of tungsten hexachloride. One method involves the use of tetrachloroethylene as the reductant [2] 2 WCl 6 + C 2 Cl 4 → W 2 Cl 10 + C 2 Cl 6. The blue green solid is volatile under vacuum and slightly soluble in nonpolar solvents. The compound is oxophilic and is highly reactive toward Lewis bases.
W(PMe 3) 4 (η 2-CH 2 PMe 2)H was first synthesized in 1983 by reacting tungsten hexachloride with trimethylphosphine and sodium under a nitrogen atmosphere. [6] The complex was also a very minor product synthesized as a part of a reaction aimed at generating cyclopentadienyl- and PMe 3-containing tungsten complexes by co-condensing tungsten atoms, PMe 3, and cyclopentene at −196 °C. [7]
Crystallography is the branch of science devoted to the study of molecular and crystalline structure and properties. [1] The word crystallography is derived from the Ancient Greek word κρύσταλλος ( krústallos ; "clear ice, rock-crystal"), and γράφειν ( gráphein ; "to write"). [ 2 ]
The chapter analyzes 22 of Escher's design in terms of black-white symmetry and assigns each a symbol in the international notation describing its symmetries. In the third chapter, Patterns with Polychromatic Symmetry, the analysis is extended to 7 of Escher's design possessing three or more colors. The book is printed in full color to ...
W(CH 3) 6 adopts a distorted trigonal prismatic geometry with C 3v symmetry for the WC 6 framework and C 3 symmetry including the hydrogen atoms. The structure (excluding the hydrogen atoms) can be thought of as consisting of a central atom, capped on either side by two eclipsing sets of three carbon atoms, with one triangular set slightly larger but also closer to the central atom than the other.
Examples of bcc include iron, chromium, tungsten, and niobium. Examples of fcc include aluminium , copper , gold and silver . Another important cubic crystal structure is the diamond cubic structure, which can appear in carbon , silicon , germanium , and tin .