Gallium isolation

Sohleoht S, Sohafer R, Woenokhaus J and Beoker J A 1995 Eleotrio dipole polarizabilities of isolated gallium arsenide olusters Chem. Phys. Lett. 246 315... 

Gallium was predicted as eka-aluminium by D. 1. Mendeleev in 1870 and was discovered by P. E. Lecoq de Boisbaudran in 1875 by means of the spectroscope de Boi.sbaudran was, in fact, guided at the time by an independent theory of his own and had been searching for the missing element for some years. The first indications came with the observation of two new violet lines in the spark spectrum of a sample deposited on zinc, and within a month he had isolated 1 g of the metal starting from several hundred kilograms of crude zinc blende ore. The... 

The first spirogallanate [Li(thf)12-crown-4][(PhC=CPhPhC=CPh)2Ga] 281 was isolated from the reaction of 1,4-dilithiotetraphenylbutadiene and GaCl3.198 The gallium center adopts a severely distorted tetrahedral coordination sphere with bond angles ranging from 87.4(2)° to 131.8(2)° (Figure 14). 

However, mixtures of these products with some gallium rich metalloid clusters were formed so that this method is rather inadequate, and compounds 10-12 were isolated in very low yields. 

Notes on cluster phases in triel alloys. Li and Corbett (2004) have shortly reviewed the systematic and extensive experimental and theoretical work carried out by Corbett and co-workers (see for instance Corbett 1996). Considering alkali metal-triel alloys, they underlined, particularly for Ga, In and Tl, the richness of their chemistry (see also 5.3.4.4). Gallium forms many anionic network structures (and only a few phases containing isolated cluster units), indium gives several examples of both network and discrete cluster structures, thallium forms especially discrete clusters (Tl , T157A Tl , Tl , Tl(f, Tl ). 

Gallium - the atomic number is 31 and the chemical symbol is Ga. The name derives from the Latin gallia for France or perhaps from the Latin gallus for le coq or cock , since it was discovered in zinc blende by the French chemist Paul-Emile Lecoq de Boisbaudan in 1875. It was first isolated in 1878 by Lecoq de Boisbaudran and the French chemist Emile-Clement Jungflesch. This element had previously been predicted as eka-aluminum by Mendeleev, along with its properties and its location in the Periodic Table. 

While no aluminum derivatives featuring the 1,8-naphthalenediyl backbone have ever been isolated, several gallium species have been successfully prepared. With the... 

Alkane elimination was also observed upon heating of the adducts RaGa NH2-NR R" [4 to 7, Eq. (2)] in boiling toluene, which gave the hydrazides 15 to 18 in excellent yields [Eq. (6)] [17]. One compound (17) was characterized by a crystal structure determination. Similar gallium hydrazides were obtained directly at room temperature without the isolation of stable adducts when the phenylhydrazine derivatives H2N-N(H)CeH5 [18] and H2N-N(C6Hs)2 [17] were employed. The products (15 to 18) form dimers... 

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