Metal-containing compounds Aluminum chloride

Metal-containing compounds, Aluminum Compounds (Continued) Dichlorobis(cyclopentadienyl)titanium-Trimethylaluminum, 71 Diethylaluminum chloride, 173 Diethylaluminum fluoride, 25 Diiodomethane-Triisobutylaluminum, 114... 

Aluminum (Al) Aluminum is a silvery white metal with a relatively low density of 2.7 g/cm3. For this reason, aluminum is a popular material for construction. Alloying aluminum with other metals improves its strength. Elemental aluminum does not occur in nature, and must be synthesized by the energy-intensive Hall process. Compounds containing aluminum are found in antiperspirants (aluminum chloride) and antacids (aluminum hydroxide). 

The synthesis of metal graphite compounds is carried out by the reduction of layer graphite compounds and metal chlorides by using different reducing agents such as, for instance, solutions of aromatic anion radicals in THF, metallic sodium in liquid ammonia, complex boron and aluminum hydrides, and vapor or liquid potassium. As a result, the complex compounds containing one (Sn, Co, Mn, Cr, Mo, W, Pd) and two (Fe-Mo, Fe-W, or Mo W) metals were synthesized. 

Free-ion attack is more likely for sterically hindered R. The ion CH3CO has been detected (by IR spectroscopy) in the liquid complex between acetyl chloride and aluminum chloride, and in polar solvents, such as nitrobenzene but in nonpolar solvents, such as chloroform, only the complex and not the free ion is present." In any event, 1 equivalent of catalyst certainly remains complexed to the product at the end of the reaction. When the reaction is performed with RCO+SbFg, no catalyst is required and the free ion" " (or ion pair) is undoubtedly the attacking entity." The use of LiC104 on the metal triflate-catalyzed Friedel-Crafts acylation of methoxy-naphthalene derivatives has been examined, and the presence of the lithium salt leads to acylation in the ring containing the methoxy unit, whereas reaction occurs in the other ring in the absence of lithium salts." Note that lithium perchlorate forms a complex with acetic anhydride, which can be used for the Friedel-Crafts acetylation of activated aromatic compounds." ... 

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