Boron-selenium bond

Compounds containing the boron-chalcogen bond, in Handbook of Chal-cogen Chemistry New Perspectives in Sulfur, Selenium and Tellurium, ed. F. A. Devillanova, Royal Society of Chemistry, Cambridge, 2007, pp. 17-19. 

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... 

Compounds 66 and 67 typically reacted through the boron-boron multiple bond to afford n-complexes with coinage or alkali metals (68 and 69, Figure 5.10). Additionally, complexes 62, 66, and 67 were shown to undergo simultaneous B-B bond cleavage/cycloaddition reactions by oxidation with elemental sulfur or selenium (70 and 71). " Diboron complexes 66 and 67 also reacted with carbon monoxide and isonitriles, respectively, to afford NHC-stabilized bis(boralactone) 72 and bis(boraketenimine) 73. ... 

Unsaturated compounds containing both a double bond and a charactensbc group such as hydroxyl, carbonyl, or nitnle or an organophosphorus, -selenium sulfur, -iodine, or -boron group are also included in this section even when only the double bond IS oxidized... 

The methods available for synthesis have advanced dramatically in the past half-century. Improvements have been made in selectivity of conditions, versatility of transformations, stereochemical control, and the efficiency of synthetic processes. The range of available reagents has expanded. Many reactions involve compounds of boron, silicon, sulfur, selenium, phosphorus, and tin. Catalysis, particularly by transition metal complexes, has also become a key part of organic synthesis. The mechanisms of catalytic reactions are characterized by catalytic cycles and require an understanding not only of the ultimate bond-forming and bond-breaking steps, but also of the mechanism for regeneration of the active catalytic species and the effect of products, by-products, and other reaction components in the catalytic cycle. 

Selenium-boron bonds. Boron as a low-electronegativity element does not deshield attached selenium atoms. On the contrary, the Se NMR spectrum of HsB-Se-Se-BHa shows two resonances at 8 = —392 and —509 which were... 

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. 

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