Group 16 elements sulfur

Note The wingtip groups containing a sulfur and a nitrogen functionality elect to coordinate to the transition metal via its sulfur atom and not its nitrogen atom (as was the case with the main group element sulfur). 

The sixth-group elements sulfur, selenium, and tellurium are much less electronegative than their congener oxygen, which was discussed in Chapter 6, and their chemical properties are correspondingly distinctive. 

The Eastman Chemical Company has pubHshed extensively in the patent Hterature (65—74) and the scientific Hterature (75—77) on processes for making poly(phenylene sulfide)- (9-(phenylene disulfide), and related copolymers. The Eastman process involves the reaction of elemental sulfur with Ndiiodobenzene to yield a phenylene sulfide polymer that also contains phenylene disulfide repeating units in the polymer. The fraction of repeating groups containing... 

Vol 12 PerfluorohaloorganiL Compounds of Main Group Elements Part 2 Compounds of Sulfur (Cuniinuanon) Selenium and Tellurium... 

System No 5 Fluorine Perfluorohaloorganic Compounds of Main Group Elements Supplementary, Vol 1 Compounds with Elements of Mom Groups I to 5 (EKcludtng Nitrogen) and with Sulfur (Partially)... 

Displacement of the sulfhydryl group in primary thiols, like L cysteine and 2-diethylaminoethanethiol, requires elemental fluorine, the most active oxidant Elemental sulfur is the major by-product in those reactions [7] (equation 2)... 

The tetrasulfides R R MS4 with M=Si, Ge, Sn, or Pb bearing bulky substituents on the group 14 element were synthesized by the reaction of the corresponding divalent species R R M, which are heavier analogues of the carbenes, with elemental sulfur (see Scheme 1) [11-20]. The divalent species... 

Wachter et al. reported the synthesis of polysulfido complexes of group 5 metals by the reaction of the corresponding trihydrides with elemental sulfur (Scheme 15). The reaction of Cp yNbHs with Ss gives the dinuclear poly-... 

Reactions of metal halides with polysulfide dianions are useful methods for the synthesis of polysulfido complexes of main group elements and transition metals. In most of these reactions, similarly to other methods, the chain lengths and coordination types of the polysulfide ligands depend on the other ligands coordinated to the metal, on the ratio between the metal and sulfur, on the reaction temperature, and other parameters. 

The sulfur-rich oxides S 0 and S 02 belong to the group of so-called lower oxides of sulfur named after the low oxidation state of the sulfur atom(s) compared to the best known oxide SO2 in which the sulfur is in the oxidation state +4. Sulfur monoxide SO is also a member of this class but is not subject of this review. The blue-green material of composition S2O3 described in the older literature has long been shown to be a mixture of salts with the cations S4 and Ss and polysulfate anions rather than a sulfur oxide [1,2]. Reliable reviews on the complex chemistry of the lower sulfur oxides have been published before [1, 3-6]. The present review deals with those sulfur oxides which contain at least one sulfur-sulfur bond and not more than two oxygen atoms. These species are important intermediates in a number of redox reactions of elemental sulfur and other sulfur compounds. 

A stable diarylstannanethione has been synthesized by the reaction of an extremely bulky stannylene with either styrene episulfide95 or less than one equivalent of elemental sulfur.9 If the 2,4,6-tris[bis(trimethylsilyl) methyl]phenyl group (Tb) is replaced by the smaller mesityl group, no monomeric products are observed thus the stability of the stannanethione is attributed to the demand of the substituents. 

A hydrospirophosphorane 154 reacts with methylsulfide via a free radical mechanism (Equation 7) <2001JOC6181>. The success of the reaction is dependent on their being minimal steric congestion around the central phosphorus of the radical species that attacks the dimethyl sulfide. Phosphoranes carrying the SMe group have been prepared by treating the hydrophosphorane 70 (R = H) with DBU, followed by elemental sulfur and methyl iodide (Equation 8)... 

Phenothiazines are well-known as intermediates for pharmaceuticals, and are also active as insecticides and antioxidants. These compounds are usually prepared by the thiation of diphenylamines with elemental sulfur. In this context, the group of Toma has elaborated a synthesis of 3-phthalimidophenothiazine, as shown in Scheme 6.265 [455]. Using a variety of high-boiling solvents under conventional thermal reflux conditions, low isolated yields of the desired product were obtained. The highest conversion and isolated product yield (55%) was achieved by microwave irradiation of a mixture of the starting N-(4-phenylaminophenyl)phthalimide with... 

Gonzales-Moraga, G. (1993). Cluster Chemistry. Springer-Verlag, New York. A comprehensive survey of the chemistry of clusters containing transition metals as well as cages composed of main-group elements such as phosphorus, sulfur, and carbon. 

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