Alkaline earth metals containing molecules

Initially, pigments had been found which could be rendered insoluble in organic media if they were converted into polar structures molecules containing sulfo or carboxylic acid groups form insoluble salts with alkaline earth metals or manganese ( lakes , Sec. 2.7). 

A 1.005 g sample of an unknown alkaline earth metal was allowed to react with a volume of chlorine gas that contains 1.91 X 1022 CI2 molecules. The resulting metal chloride was analyzed for chlorine by dissolving a 0.436 g sample in water and adding an excess of AgN03(fl(7). The analysis yielded 1.126 g of AgCl. 

The surface of states of equal energy in the reciprocal (i /X) space is only approximately spherical (see above). Before a zone is completely filled up to the corners, electrons with the same energy will already find a place in the next higher zone (Fig. 28 B). With the alkaline earth metals Ga, Sr (face-centred) and Ba (body-centred) the first zone can contain 2 electrons per atom so that the two valence electrons would just fill this zone. These metals, as a consequence of the overlap, are nevertheless conductors, in contrast to the above-mentioned linear molecule,... 

The compounds known as tungsten bronzes are reduction products of the tungstates of the alkali and alkaline earth metals. Their exact constitution is not known, but it is generally recognised that the molecule contains several hexavalent tungsten atonrs and one tetravalent tungsten atom, and may be represented by the formula R 20.(W03)4,. WOj. The empirical formula accordingly becomes R 2(W03),.j,4. 

The deposition of alkaline-earth-metal atoms and ozone molecules at high dilution in argon at 15 K yields species showing intense bands in the i.r. at 800 and 450—650 cm-1. Those at 800 cm"1 showed the appropriate isotopic shifts for assignment of v3 for the ozonide ion, Oj. The use of scrambled isotopic ozones indicates that the metal cation is symmetrically bound to the ozonide ion, which contains three O atoms, with two of these equivalent. In addition, calcium and barium mixtures with ozone contain several metal oxide species tentatively identified as (CaO)2, Ca02,BaO, and (BaO)2, respectively.73... 

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