Gallium Group 13 elements

KINETIC STUDY OF THE ISOTOPIC EXCHANGE OF EDTA COMPLEXES OF THE GALLIUM GROUP ELEMENTS,... 

Little information is available concerning the isotopic exchange of coordination compounds of tervalent gallium group elements, which have the typical d structure. We have undertaken the kinetic study by use of EDTA complexes of these elements labelled with radioisotopes. Similar studies with EDTA-OH (N-2-hydroxyethylethylenediamine-N, N, N -triacetate) complexes were also made for comparison. 

The hydrides of the later main-group elements present few problems of classification and are best discussed during the detailed treatment of the individual elements. Many of these hydrides are covalent, molecular species, though association via H bonding sometimes occurs, as already noted (p. 53). Catenation flourishes in Group 14 and the complexities of the boron hydrides merit special attention (p. 151). The hydrides of aluminium, gallium, zinc (and beryllium) tend to be more extensively associated via M-H-M bonds, but their characterization and detailed structural elucidation has proved extremely difficult. 

This method has been the most useful for the preparation of metal complexes. Several compounds containing main-group elements such as boron, gallium, indium, silicon, germanium, tin and lead as the metal are shown in equations 134 , 135, 136 , 13791.146, i3gi3i 139 , 140 and 141 . 

Boron (B) heads the third family of main-group elements, but its properties are not representative, as the Group 3A(13) Family Portrait shows. Metallic aluminum (Al) is more typical of the group, but its great abundance and importance contrast with the rareness of gallium (Ga), indium (In), and thallium (Tl). 

Once again, there has been strong interest in the synthesis and characterisation of organophosphido derivatives of other main group elements, notably aluminium, gallium, indium, and germanium, tin, and lead. °° In addition, organophosphido derivatives of lanthanide, actinide, and d-block transition elements, ° have been described. 

Most of the boron group elements exhibit a tripositive (3+) oxidation state however, they can be occasionally found in a unipositive (1+) state (with the exception of boron itself, which we describe in more detail later in this chapter). Keep reading to find out the details of five of the Group 13 (the 13th column on the periodic table) elements boron, aluminum, gallium, indium, and thallium. 

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