Polysulfane organic

The reaction of organic sulfenyl chlorides RSCl or chlorodisulfanes RSSCl with sulfanes provides organic polysulfanes in preparative quantities [2] ... 

Very often inorganic polysulfides have been used to synthesize organic polysulfanes by reaction with, for example, alkyl or aryl halides [109, 110], e.g. ... 

Metal-polysulfido complexes have been synthesized by a variety of methods using various reagents as sulfur sources, e.g., Ss, M2S (M=alkali metal), P2S5, H2S, organic polysulfanes, etc. The nature of the resulting polysulfido complexes often depends on the reaction conditions such as the ratio of starting materials, solvents, reaction temperature, and reaction time. In addition, the use of different ligands leads to the different results in most cases. This section shows typical synthetic methods for metal-polysulfido complexes based on recent reports on their syntheses. 

This type of reaction takes place when unstable solid sulfur allotropes decompose, when it-sulfur is formed from Sg on heating, when liquid sulfur polymerizes and depolymerizes at 160-190 °C, when organic polysulfanes, R2S , decompose and... 

In class I mixed valence species, electron transitions between sites are energetically difficnlt to accomplish. In the sohd state, these materials are generally insnlators. However, with class II and class III compounds, electron transfer becomes much easier so that conducting and superconducting materials are obtained (see Sulfur Organic Polysulfanes). 

Selenium Organoselenium Chemistry Selenium Proteins Containing Selenocysteine Sulfur Organic Polysulfanes Tellurium Inorganic Chemistry Tellurium OrganoteUurium Chemistry. 

Soluble low-valent metal alkoxides can also be synthesized by replacing small alkoxy group OR by bulky polydentate ligands such as 2-methoxyethanol CH3OC2H4OH. This solvent is currently used to prevent polymerization and get soluble molecular precursors with low-valent metal cations such as Cu + in the sol-gel synthesis of advanced ceramics such as high Tc superconductors YBa2Cu307 j (see Sulfur Organic Polysulfanes) ... 

In general, the sulfanes have a less well-developed chemistry, partly because of the difficulty in isolating them pure, although they have been used for the synthesis of some organosulfur compounds see Sulfur Organic Polysulfanes). 

Iron-Sulfur Proteins Sulfur-Nitrogen Compounds Sulfur Organic Polysulfanes. 

Ammonia N-donor Ligands Electronic Structure of Main-group Compounds Mixed Donor Ligands Sulfur Inorganic Chemistry Sulfur Organic Polysulfanes. 

Natural Occurrence of Organic Polysulfanes and Their Biological Activity... 

The organic polysulfanes described in this article are compounds of the type R-S -R with n > 2 they may be chain-like or cyclic. The organic residues (alkyl or aryl) are linked to the sulfur chain via carbon atoms. These compounds are also known as organic polysulfides. 

Since the chemistry of organic polysulfanes is closely related to their oxidized derivatives, Table 2 presents the well-characterized species with up to three sulfur atoms in the chain. The systematic nomenclature based on the lUPAC recommended name sulfanes is also given in Table 2. In addition, conventional names for some of these compounds are shown in brackets. 

Bifunctional thiols react with dichlorosulfanes to give cyclic organic polysulfanes (Section 2.2.1). 

Figure 1 Cyclic polysulfanes prepared from organic dithiols and elemental sulfur in the presence of ammonia as a catalyst...

Titanocene pentasulfide (1) has been used as a transfer reagent for the S5 unit to prepare numerous inorganic homo- and heterocycles. More recently, cyclic organic polysulfanes have also been obtained from (1) by reaction with bis(sulfenyl chlorides) (equation 99). ... 

---