Compounds of Aluminum

Various inorganic esters have been claimed as coupling agents for reinforced plastics, including aminobenzyl phosphonates, dicetylisopropylborate, alkoxy compounds of aluminum, zirconium and titanium, zircoaluminates, and numerous substituted titanates [1]. These metal alkoxides could function in a similar manner to the orthosilicates by reacting with hydroxylated substrates. Like the simple orthosilicates such as tetraethyl orthosilicate (TEOS), it is less evident how an-... 

C.19 Aluminum oxide, alumina, exists in a variety of crystal structures, some of which are beautiful and rare. Write the formula for aluminum oxide, which is a binary compound of aluminum and oxygen. The mass of a rectangular slab of aluminum oxide of dimensions 2.5 cm X 3.0 cm X 4.0 cm is 102 g. What is the density of aluminum oxide ... 

Charles Hall was inspired by his chemistry professor at Oberlin College, who observed that whoever perfected an inexpensive way of producing aluminum would become rich and famous. After his graduation. Hall set to work in his home laboratory, trying to electrolyze various compounds of aluminum. He was aided by his sister Julia, who had studied chemistry and shared Charles interests. Julia helped to prepare chemicals and witnessed many of the electrolysis experiments. After only eight months of work. Hall had successfully produced globules of the metal. Meanwhile, Heroult was developing the identical process in France. 

Name and write formulas for each of the following (a) the compound of sodium and bromine (b) the compound of magnesium and bromine and (c) the compound of aluminum and bromine. 

E. R. Petty, Hot Hardness and Other Properties of Some Binary Intermetallic Compounds of Aluminum, Jour. Inst. Metals, 89,343 (1960-61). 

Aluminum is very malleable, as anyone can see from the thin rolls of aluminum foil (sometimes wrongly called tin foil ) used in modem kitchens. Toothpaste tubes are made of aluminum, and so are many toys and various parts of cars. There is even an artificial ruby made of a compound of aluminum, used in jeweled watches. Aluminum does not corrode, and so it is used for kitchenware and for many items in the construction industry. Because aluminum is light, it is used a great deal in airplane construction. 

We have already mentioned that the mixed alkyl halide compounds of aluminum dimerize, and the solubility parameters shown in Table 12.1 for these compounds are consistent with that assessment. The solubility parameters for triethylboron and diethylzinc are 15.4 and 18.2 in J cm 3/2, respectively. These values are indicative of liquids that are not strongly associated, which is known to be the case. 

Other organometallic compounds of aluminum include the alkyl hydrides, R2A1H. Molecular association of these compounds leads to cyclic tetramers. When the dimeric and trimeric compounds are dissolved in a basic aprotic solvent, the aggregates separate as a result of formation of bonds between A1 and the unshared pair of electrons on the solvent molecule. Toward Lewis bases such as trimeth-ylamine, aluminum alkyls are strong Lewis acids (as are aluminum halides). 

Figure 19 Examples of some cyclopentadienyl compounds of aluminum.

This chapter emphasizes cage and cluster compounds of aluminum, gallium and indium incorporating nitrogen atoms. A search of the literature reveals a number of monographs and reviews [31-33] as well as recent research articles available on this subject. Reactions of alanes and alanates with various amines leading to iminoalanes and aminoalanes have been well documented [21, 31, 34-36], In summary, there are reports on the formation of iminoalanes from Eqs. (13) to (17). 

Tab. 3.5-3. Structurally characterized oxygen compounds of aluminum, gallium and indium (the heterocubane type compounds have been included in Table 3.5-2).

Cobalt blue [ColAlO lj], also known as cobalt ultramarine or azure blue, is a compound of aluminum oxide and cobalt. It is used as a pigment that mixes well with both oil and water. It also has cosmetic uses for eye shadow and in grease paint. Cobalt blue is one of the most durable blue pigments in that it resists weathering in paints and holds up to other wear and tear. 

A hi mi nidcs. These are intermetalhc compounds of aluminum. The potential of these products includes uses where low weight, high-temperature strength, and oxidation resistance are required. Traditionally, these products are made by way of powder metallurgy technology. 

B. Compounds of Aluminum, Gallium, Indium, and Thallium 1. Simple Organometa Amides... 

Golubeva, A.V. (1982) Synthesis of hydride compounds of aluminum using binary hydrides of alkaline metals in conditions of mechanical activation and their utilization for synthesis of non-solvated aluminum hydride. Ph.D. Thesis in the field of chemistry, Moscow, 162 p. 

Caution. Hydride compounds of aluminum are extremely air- and moisture-sensitive and may ignite if exposed to air. The use of Schlenk ware, syringes, and/or an inert atmosphere are necessary for handling these compounds. An excellent reference of necessary techniques is given by Shriver.10 All reactions should be conducted in a well-ventilated fume hood. 

Some physical and chemical properties of aluminum are presented in Table 1. As expected for the [Ne] 3s 3p coirfiguration, the fourth ionization potential is prohibitively high. Therefore, the most common oxidation state of aluminum is three although compounds of aluminum(I) can be prepared. However, the latter species quickly disproportionate to elemental aluminum and aluminum(in) compounds. 

Aluminum alkyl compounds of aluminum in which a bond exists between aluminum and a carbon of an alkyl group... 

Aluminum is the most abundant metal and the third most abundant element in the Earth s cmst, behind only oxygen and silicon. Its low weight and useful properties make aluminum and its alloys valuable materials for manufacturing and electrical applications. Inorganic compounds of aluminum are plentiful and used as absorbents, catalysts, ionic conductors, ceramics, and electrical materials. Organometalhc compounds of aluminum are also of great industrial importance and fundamental discoveries continue to be made regarding the variety of coordination numbers, structures, oxidation states, and reactivity exhibited by aluminum. ... 

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