Sulfur phosphorus—selenium bonds

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... 

Phosphorus—selenium bonds, alkyne additions, 10, 782 Phosphorus—sulfur bonds, alkyne additions, 10, 781 Phosphorus ylides with gold(I), 2, 275 with trinuclear Os clusters, 6, 740 Phosphoylides, actinide complexes, 4, 203 Photoacoustic calorimetry, in thermochemistry, 1, 612-613 Photoactive molecular devices, and -[RefCO) ,] fragment, 5, 886... 

R.A. Chittenden and L.C. Thomas, Characteristic infra-red absorption frequencies of organophosphorus compounds-III. Phosphorus-sulfur and phosphorus-selenium bonds, Spectrochim. Acta, 20, 1679-1696 (1964). 

Thus, the y-phosphate group of ATP is transferred to some group of the protein and the enzyme phosphoryl intermediate is attacked by the selenide generating the only known direct phosphorus-selenium bond in biology. The ADP, which stays complexed to the enzyme is concomitantly hydrolyzed to AMP, and thus thermodynamically drives the overall reaction. Sulfide does not serve as a substrate even at high concentrations, so SPS is one of the few enzymes that can discriminate between its Se substrate and the sulfur homolog. Recent evidence also indicates that the actual substrate is not free selenide but rather some selenium species generated from selenocysteine via the activity of one of the selenocysteine lyases present in the cell. ... 

The 4,6-diamino-1,3,5-triaza-2-phosphapentalenes are deep red crystalline solids. For reactions, the 4,6-bis(diethylamino) derivative (99) was used (Scheme 34). The compound is not oxidized by air and does not react with sulfur or selenium. Alkylation takes place at the nitrogen atom adjacent to phosphorus. With diethylamine and alcohols no reaction is observed <86CB3213,87PS(30)780>. On simultaneous oxidation by sulfur or selenium, however, alcohols add to the P=N bond yielding... 

Only for a few organozinc compounds, in which in addition to the zinc-carbon bond a zinc-heteroatom bond other than oxygen or nitrogen is present, have structures in the solid state been determined. These structures include those of organozinc compounds in which, in addition to the zinc-carbon bond, a zinc-sulfur, zinc-selenium, zinc-phosphorus or zinc-arsenic bond is present. 

Reductive Cleavage of Carbon-Phosphorus, Carbon-Sulfur, and Carbon-Selenium Bonds... 

Because of the radical mechanism for SET reactions, introduction of both a perfluoroalkyl group and a heteroatom moiety to the carbon-carbon double [17-20] and even triple [21] bonds is possible. The initially generated perfluoroalkyl radicals add first to olefins to form a new radical intermediate (23), which then couples with anions (22) to form new anion radicals (24). The formation of the product (25) and the chain propagation via electron transfer from anion radicals (24) to perfluoroalkyl halides constitutes a chain reaction as shown in Scheme 2.38. Sulfur [19], selenium [20], tellurium [21], and phosphorus [22] anions (22) have been employed for these reactions [23]. 

Ozonolysis of Carbon-Heteroatom Bonds and Heterocyclie Compounds. The ozonolysis of nitrogen, phosphorus, sulfur, and selenium to form iV-oxides, phosphine oxides and phospho-nates, sulfoxides, and selenoxides that can be used to functionalize various substrates has been weU documented. A useful application of the power of ozonolysis is to cleave carbon heteroatom bonds for conversion into carbonyl compounds. A useful... 

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