Polarographic behaviour of diisopropylaminoethane thiol hydrochloride

✍ Scribed by R.S. Saxena; U.S. Chaturvedi

• Publisher: Elsevier Science
• Year: 1973
• Tongue: English
• Weight: 324 KB
• Volume: 18
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(73)80037-4

✦ Synopsis

The polarographic behaviout of diisopropylaminoethanethiol HCl (RSH) has been studied in presence of O-1 M LiCl at the dme. The effects of pH, supporting electrolyte, concentration, drop time and temperature on the characteristics of the wave have been investigated. The curves consist of two waves-a small pre-wave followed by a normal anodic wave over the entire pH range (260-1260). The maximum number of moles absorbed on unit area is 3.98 x lo-lo mo1e/cm2, ie 24 x lOI molecules/cm2, which corresponds to an area 41.6 A' per adsorbed molecule. The adsorption coefficient and molar adsorption energy are 6.34 x lo2 and 26.34 kcal/mole respectively. The electrode reaction is reversible, diffusion-controlled and involves a one-electron transfer process. The pK of the -SH group is 10.6. Controlled-potential electrolysis, interaction with mercuric chloride and mathematical analysis reveal the depolarization of mercury with the formation of a Ha(I) complex, mercurous mercaptide RSHg, which rapidly changes to more stable mercuric complex (RShHg.