Aromatic Dithiols Research Articles

Curing of poly( p-phenylene sulphide) with aromatic dithiols

The curing of poly( p-phenylene sulphide) with 1,4-benzenedithiol, 4,4′-dimercaptodiphenyl and 4,4′-dimercaptodiphenyl sulphide has been studied. The influence of crosslinking on some properties has been examined. The mechanism of curing has been discussed.

Synthesis and study of properties of oligophenylenesulphide quinones

Abstract A study was made of polycondensation of aromatic dithiols with benzoquinone. Physical and chemical properties of the oligophenylenesulphide quinones formed were examined; they can be used as polyfunctional crosslinking agents for aromatic polymers.

Derivatives of polythiophenylenes

AbstractPolythiophenylenes and polyoxythiophenylenes were prepared from aromatic dithiols and 1,4‐dichlorobenzene. The polymers were chlorinated, sulphochlorinated and nitrated. The chlorination was successful for polythiophenylenes and to a lesser extent for polyoxythiophenylenes. The nitration succeeded for polyoxythiophenylenes only and the sulphochlorination occurred only slightly for both polymers. The products were investigated by IR‐spectroscopy, differential scanning calorimetry and elemental analysis.

Synthesis of ferrocene paracyclophanes

Paracyclophanes containing one or two ferrocene units can be efficiently synthesized directly from 1,1′-di(hydroxymethyl)ferrocene and aromatic dithiols. In the reaction with di(4,4′-dimercaptomethylphenyl)methane the mononuclear paracyclophane was formed, while with the dithiophenols di(4,4′-dimercaptophenyl)methane and di(4,4′-dimercaptophenyl)ether, cyclophanes bearing two ferrocene units were obtained. For comparison three open-chain analogues were also prepared.

Syntheses of Some Condensation Polymers by Phase-Transfer Catalyzed Polycondensation

Abstract Fundamental studies on the two-phase polycondensation using various phase-transfer catalysts such as quaternary ammonium and phosphonium salts, crown ethers, and poly(ethylene glycol)s yielded information useful for the synthesis of a variety of condensation polymers. We successfully synthesized various types of condensation polymers such as aromatic polysulfonates and polyphosphonates, aromatic polyethers, aliphatic and aromatic polysulfides, and carbon-carbon chain polymers of high molecular weights by the phase-transfer catalyzed polycondensation from combinations of aromatic disulfonyl chlorides, phosphonic di-chlorides, activated aromatic dichlorides, and aliphatic dihalides, with bisphenols, aliphatic and aromatic dithiols, and active methylene compounds. The two-phase polycondensation was generally carried out in a water-immiscible organic solvent-aqueous alkaline solution system at room temperature or above. In conclusion, this method of polycondensation offers a highly versatile and convenient synthetic method for a variety of condensation polymers.

Heterocyclic cyclophanes. Part I. Thiacyclophanes from thiols

The formation of thia [5,5]cyclophanes from carbonyl compounds and aromatic dithiols has been re-investigated. The synthetic procedure was improved and crystalline thiacyclophane oligomers were also isolated. N.m.r. and u.v. data of the thiacyclophanes were obtained and their usefulness in determining the structures is discussed.