Sulfur nitrogen fluorides

The nitrogen fluoride series has an unexpected maximum at NF2 but the sulfur fluorides show alternations in D SFn—F) values with minima at odd-electron molecules. If rehybridization energies at ZXSF4—F) and ZHSF2—F) stages are superimposed on the regular... 

Unsaturated fluorinated compounds are fundamentally different from those of hydrocarbon chemistry. Whereas conventional alkenes are electron rich at the double bond, fluoroal-kenes suffer from a deficiency of electrons due to the negative inductive effect. Therefore, fluoroalkenes react smoothly in a very typical way with oxygen, sulfur, nitrogen and carbon nucleophiles.31 Usually, the reaction path of the addition or addition-elimination reaction goes through an intermediate carbanion. The reaction conditions decide whether the product is saturated or unsaturated and if vinylic or allylic substitution is required. Highly branched fluoroalkenes, obtained from the fluoride-initiated ionic oligomerization of tetrafluoroethene or hexafluoropropene, are different and more complex in their reactions and reactivities. 

When the 2-hydroxy group of a monosaccharide reacts with (diethylamino)sulfur tri-fluoride (DAST), quantitative and stereoselective rearrangements are observed (K..G Nico-laou, 1986). This reaction may simultaneously introduce fluorine to C-l and a new oxygen, sulfur, or nitrogen residue to C-2 with inversion of configuration. 

Air pollutants can affect plants both directly and indirectly. The principal phytotoxic air pollutants are ozone, nitric oxide, nitrogen dioxide, sulfur dioxide, fluorides, and peroxyacyl nitrate (PAN). Their toxic effects have been demonstrated convincingly through field measure-... 

H. W. Roesky, H. H. Giere, Inorg. Nucl. Chem. Lett. 1971, 7, 171-175. Sulfur-nitrogen compounds. 33. Preparation of iV-(trifluoromethylsulfonyl)sulfamoyl fluoride and some reactions. 

Nitrogen trifluoride passed into molten sulfur at 350 to 400°C reacts to give thiothionyl fluoride, SSF2, and thiazyl fluoride, NSF, as main products and smaller amounts of SF4, SFe, and SO2F2. The composition of the product mixture depends on the depth of the molten sulfur layer and the contact time of the NF3. Below 350°C, small amounts of N3S3F3 are formed [1]. The combustion of sulfur with nitrogen fluoride in a nickel bomb proceeds according to the... 

This is because, for example, the names chlorate (Figure 9.10) and manganate are not precise enough and potentially refer to more than one species. For compounds between non-metals the Stock notation is generally not used and the actual numbers of tbe atoms in tbe molecular formula are shown in the name. For example, dinitrogen oxide, N2O, rather than nitrogen(i) oxide and sulfur hexafluoride, SFg, rather than sulfur(vi) fluoride. 

The reactivity of fluorine compounds varies from extremely stable, eg, compounds such as sulfur hexafluoride [2551-62 ] nitrogen trifluoride [7783-54-2] and the perfluorocarbons (see Fluorine compounds, organic) to extremely reactive, eg, the halogen fluorides. Another unique property of nonionic metal fluorides is great volatiUty. Volatile compounds such as tungsten hexafluoride [7783-82-6] molybdenum hexafluoride [7783-77-9] ... 

Perfluorinated acid fluorides containing heteratoms are also accessible by ECF. Long-chain perfluorinated acid fluorides produced by ECF containing nitrogen (10—12), oxygen (13), and sulfur (14,15) have been reported. The fluorinated mixed sulfonic acid—carboxyflc acid precursors are also known. ECF of hydrocarbon sultones has led to formation of FS02(CF2) C0F, where n = 2,3 (16). 

---