Abstract

Abstract : The new organogallium(I) compound (Ga(CH2CMe3))n has been prepared by the reduction of Ga(CH2CMe3)2Cl by using either sodium or lithium with naphthalene in THF. When the reagents were combined at -78 deg C, a yellow intermediate, a neopentylgallium(III) derivative of dihydronaphthalene C10H8(Ga(CH2CMe3)2)2 (dot) 2 MCl (M = Li, Na) was formed. Warming of the solution to 0-25 deg C resulted in decomposition of the yellow intermediate and formation of a reddish brown solution of Ga(CH2CMe3))n, Ga(CH2CMe3)3, C10H8, and either NaCl or LiCl. The gallium(I) product was a vitreous solid and was characterized by complete elemental analyses, hydrolyses with HC1/H20 and with DCl/D20, oxidation with HgCl2 and with I2, cryoscopic molecular weight studies in benzene solution and IR and NMR spectroscopic studies. All data support the conclusion that (Ga(CH2CMe3))n exists as a mixture of species which are gallium cages. The numbers of gallium atoms in these cages might range from 6 to 12 atoms. Gallium, Low oxidation state gallium compounds, Gallium clusters.

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