Methods of Synthesis of αω-Difunctional Oligosiloxanes with Two Organic Substituents Per Unit

Sulfurization of Polymers: A Novel Access to Electroactive and Conducting Materials

“…The latter is readily oxidized by elemental sulfur (see Section 3), even under milder conditions to give polyenepolysulfide 67 with elimination of extra hydrogen sulfide (Scheme 16). The polymers are not hydrolyzed by a boiling 25% aqueous solution of NaOH for 5h which indicates that they contain no Si-S bonds [37]. When they are boiled in 10% aqueous HCl (lOh), a minor amount of hydrogen sulfide is liberated and, correspondingly, the content of sulfur decreases (from 38.5 to 32.3%), which is due to the hydrolysis of residual CH=S groups in 65 and (or) intermediate structures formed during their polymerization ( > CH-S-),.…”

Sulfurization of Polymers: a Novel Access to Electroactive and Conducting Materials

“…The polymers are not hydrolyzed by a boiling 25% aqueous solution of NaOH for 5 h which indicates that they contain no Si-S bonds [37]. When they are boiled in 10% aqueous HCl (10 h), a minor amount of hydrogen sulfide is liberated and, correspondingly, the content of sulfur decreases (from 38.5 to 32.3%), which is due to the hydrolysis of residual CH¼S groups in 65 and (or) intermediate structures formed during their polymerization (>CHÀSÀ) n .…”

Efficient method for the synthesis of symmetrical α,ω-dichloro-1,1,3,3-tetraorganyldisiloxanes

“…They find a wide application in aerospace, automotive, and chemical industry; electrical engineering, pharmacy, food processing industry, cosmetics, and medicine [1][2][3].…”

“…The main method of their preparation is the controlled hydrolysis of diorganyldi chlorosilanes or diorganylchlorosilanes [1,[4][5][6][7]. They were detected in the reaction of wet iron(III) oxide with organyldichlorosilanes [8] and on the het erofunctional condensation of the latter with alkoxy chlorosilanes [9].…”