Organogermanium properties

Germanes hydride, 2 76 reactivity of, 2 87 Germanium anionic cluster, 24 227 azides, preparation, 9 138 properties, 9 135-136, 139, 141 binary carbide not reported, 11 211 carbides, preparation of, 11 163 chalcogenide halides, 23 390 chlorides, mass spectra of, 18 248, 249 complexes, xenon fluoride reactions, 46 85 compounds, see also Organogermanium compounds... 

NQR, 22 216 olefin complexes of, 4 85 in organogermanium compounds, 27 141,143 oxyfluoride, properties of, 11 29 pentacarbonyl dimets of sulfur oxydifluoride imide, 19 203-205 pentafluoride, structure, 27 102 peroxides, 6 325-326 phthalocyanine, 7 54 physical properties of, 11 18 polysulfide complexes, 31 100, 102 envelope conformation, 31 115 synthesis, 31 103-104 [Pt[15]aneS5) f, 35 75, 77 reaction with fluorinated peroxides, 16 120 salts, lattice energy and thermochemistry, 22 52-56... 

It is noteworthy that Winkler synthesized E Ge in 188723,29. Its properties were consistent with those predicted by Mendeleev. Organogermanium chemistry was born at this time. 

There was only one report before 1970 on organogermanium arsenic derivatives. In 1966, Schumann and Blass484 prepared (Me3Ge)3As by the reaction of Me3GeNMe2 with AsH3 and described some of its properties. 

Organic and organometallic substituents linked to a polyacetylene backbone influence the physical and chemical properties of the organic polymer. To study the effects of organogermanium moieties, the germanium-containing polyacetylenes... 

Carbofunctional organogermanium derivatives of 5yw -triazine exhibit immunodepressant properties. 1,3-Bis[y -(triethylgermyl)propyl]-5-fi-cy anoethy 1-2,4,6-trioxo-1,3,5-triazine decreases the number of tymocytes 1.6-fold and significantly inhibits the growth of Sarcoma 45 in white mice. 

Organogermanium compounds have properties between those of organosihcon and organotin compounds and this unique synthetic utility has not been extensively explored. Whereas organotin compounds prefer radical reactions, ionic reactions predominate with organosilicon compounds. Organogermanium compounds have both characteristics. 

Aldridge, W. N., The Biological Properties of Organogermanium, Tin and Lead Compounds, Organomet. Coord. Chem. Germanium Tin Lead, Plenary Lect. 2nd Intern. Conf., Nottingham 1977 [1978], pp. 9/31. 

Closely related to the mixed oxides are the organogermanium alkoxides, which contain the linkage Ge-O-C and may be considered as alkoxide counterparts of the organogermanium halides. Indeed, they may readily be made from such halides by the action of sodium or lithium alkoxides, or by the action of the alcohols themselves if an HCl acceptor such as a tertiary amine also is used. Conversion reactions of organogermanium alkoxides with higher alcohols also are possible. The physical properties of some such alkoxides are given in Table 18. 

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