Generalized synthesis and physical properties of dialkoxy disulfides

E Zysman-Colman, DN Harpp*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

22 Citations (Scopus)

Abstract

A substrate study was undertaken in order to probe the scope of S2Cl2 coupling of alcohols to form dialkoxy disulfides. Compounds 1b and 1f are new; along with 1a, 1c, 1h, and 1j, all of the title compounds are fully characterized, and the yields of la and 1c have been optimized from previously reported syntheses. The effect of the R-substituent about the OSSO moiety has been carefully probed as yields vary. A substrate and a solvent study of the coalescence behavior of this class was carried out. The origin of the inherently large barrier to rotation and the resultant thermal decomposition pathway is discussed. Both phenomena are shown to be solvent independent; hindered rotation is substrate independent. The decomposition of la is ca. 7 kcal/mol higher than the barrier to rotation about the S-S bond. The combined evidence suggests acyclic unsymmetric homolytic cleavage of the dialkoxy disulfide.

Original languageEnglish
Pages (from-to)5964-5973
Number of pages10
JournalThe Journal of Organic Chemistry
Volume70
Issue number15
DOIs
Publication statusPublished - 22 Jul 2005

Keywords

  • NUCLEAR-MAGNETIC-RESONANCE
  • BOND-DISSOCIATION ENERGIES
  • C-N BOND
  • SULFENATE-SULFOXIDE REARRANGEMENT
  • RESTRICT CONFORMATIONAL FREEDOM
  • ESTABLISH QUALITATIVE TRENDS
  • SUPEROXIDE THERMAL SOURCE
  • ELECTRON-SPIN RESONANCE
  • GAS-PHASE STRUCTURE
  • CARBON SINGLE BOND

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