Gallium compounds, syntheses

Furthermore, gallium compounds can serve as model systems for aluminum congeners. Cationic gallium alkyls are of interest in synthesis and catalytic applications involving polar substituents because of the relative stability of the Ga—R bond toward hydrolysis and electrophilic cleavage compared to the otherwise superior Al-R species [11]. 

We could show that the hypersilyl substituent is a very useful group in the synthesis of low valent gallium compounds. Not only the steric demand of this group but also its electronic properties, as theoretical studies have confirmed, contribute to its cluster stabilizing ability [18]. 

The last 25 years have seen the synthesis of a number of remarkable aluminum and gallium compounds containing the metals in the -K and -Ell oxidation states. Although some of these compounds do not contain true low-valent metal centers, others do contain... 

Ribonucleotide Reductases. This class of enzymes catalyzes the reduction of ribonucleotides to deoxyribonucleotides, the building blocks of DNA. Interference with this process leads to a depletion of the dNTP pool, slowing down DNA synthesis and reparation, two mechanisms affected in many types of cancer [13], Thus inhibition of the enzyme can be regarded as a therapeutic option that can be achieved by using organic molecules [14] or gallium compounds [15, 16]. 

In 1996, we started more detailed investigations on group 13/15 compounds containing the heavier elements of group 15, Sb and Bi, focussing on the synthesis of aluminum and gallium stibines and bismuthines. At the same time. Wells et al. also began to prepare M—Sb adducts and heterocycles (M = B, Ga, In). These studies, which are the object of this review, resulted in... 

This chapter is intended to highlight the synthesis and use of geminal bimetallic compounds such as gem-metallozirconocenes, but we will concentrate on the chemistry of aluminum, boron, lithium, gallium, germanium, tin, zinc, and zirconium. 

Uhl s contribution in Chapter 2 provides basic synthesis and structural information for aluminum and gallium hydrazides. These types of compounds are being explored as potential molecular precursors to metal nitrides such as the important blue-green laser material gdlium nitride. 

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