Boron-germanium bond

Addition of Boron-Silicon and Boron-Germanium Bonds 758... 

The complexes 10.8, 10.9 and ds-(Ph3P)2Pt(EMe3)[B(NzPr)2C6H4-l,2] (10.10) have been synthesized by Noth and Habereder via the oxidative addition of boron-tin or boron-germanium bonds to Pt(0) precursors [217]. 

It is believed that most of the transition metals are complexed to nitrogen donors, such as are found in amino acids or derivatives of chlorophyll, and that the metals with high ionic potentials, such as beryllium, boron, germanium, titanium, gallium, and major elements such as aluminum and silicon, may be bonded to oxygen donors of degraded lignin. 

Element-element bonds, addition to G-G multiple bonds arsenic—selenium bonds, 10, 782 boron—boron bonds, 10, 727 boron—sulfur bonds, 10, 778 B-S and B-Ge bonds, 10, 758 chalcogen—chalcogen additions, 10, 752 germanium—germanium bonds, 10, 747 germanium-tin bonds, 10, 780 overview, 10, 725-787 phosphorus—phosphorus bonds, 10, 751 phosphorus—selenium bonds, 10, 782 phosphorus-sulfur bonds, 10, 781 Se-Si and Se-Ge bonds, 10, 779 silicon-germanium bonds, 10, 770 silicon-phosphorus bonds, 10, 780 silicon-silicon bonds, 10, 734 silicon-sulfur bonds, 10, 779 silicon-tin bonds, 10, 770 tin-boron bonds, 10, 767 tin-tin bonds, 10, 748... 

Homonuclear carbonyl dimers, palladium complexes, 8, 206 Homonuclear element-element bonds, addition to C-C multiple bonds boron-boron bonds, 10, 727 chalcogen-chalcogen additions, 10, 752 germanium-germanium bonds, 10, 747 phosphorus-phosphorus bonds, 10, 751 silicon—silicon bonds, 10, 734 tin—tin bonds, 10, 748... 

Selenium-silicon and selenium-germanium bonds. Similar to boron, silicon shields Se nuclei when attached. In addition to those compounds published prior to 1995, a large number of papers have appeared reporting Se-Si and Se-Ge bonds in various constellations, a representative choice of which is illustrated below. 

Organogermanium compounds containing germanium bonds to boron aluminum gallium, indium and thallium are included in this chapter. All metal derivatives are sensitive to air and moisture. 

Although no 73Ge NMR spectra of stable doubly bonded germanium compounds have been recorded, NMR chemical shift data for the heteroatom of the double bond are available these are listed in Table II. The chemical shift of the, sp2-hybridized carbon atom of dimesitylneopentylger-mene (entry 1, Table II), without any polar substituents, falls at 8 124.2.26 The chemical shifts of the boron-substituted sp2-hybridized carbon atoms of two stable germenes (entry 2, Table II) fall in the upfield region of the... 

The tetrametalmethane species la,b which contains carbon bonded to germanium, silicon, tin, and boron have been obtained (Equations (5) and (6)),7 and the overall yield of la,b varies with the order of attachment of the different metals. 

A semiconductor of the p-type is made by doping the mother material with atoms with fewer valence electrons than those of the mother material. When germanium is doped with boron, one in every four bonds will be one electron short (fig. 11.4.9). 

The allyl-metal bond is usually broken very readily by electrophilic reagents and allyl groups are cleaved from mercury, boron, silicon, germanium, tin, and lead much more easily than are the saturated alkyl groups. Kinetic studies, however, have not been very numerous such studies are reviewed in this chapter. 

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