Spectral and magnetic studies on the complexes of 2,5-dimercapto-1,3,4-thiadiazole (bismuthiol I) with Co(II), Ni(II), Zn(II), Cd(II) and Hg(II)

Ab initio study of the tautomerism of 2,5-substituted diazoles

“…In order to explain this contradiction Thorn assumes that in concentrated chloroform solution 2,5-dimercapto-1,3,4-thiadiazole exists in thione-thiol form, while in dilute alcohol solution the dithione structure predominates [2]. After some contradictory papers [12][13][14][15][16] the thione-thiol form was concluded for DMcT but the conclusions on the basis of IR spectra were not categorical. Definite assignment of the structure of DMcT derivatives in chloroform and DMSO solution as thione-thiol form was made on consideration of 13 C NMR spectra [17,18].…”

“…The possible existence of thiol and thione tautomeric forms is one of the most interesting properties of substituted thiadiazoles [9,10] and the tautomeric equilibrium of DMcT has been a point of controversy for many authors [11][12][13][14][15][16][17][18][19][20]. X-ray investigations of 2,5-dimercapto-1,3,4-thiadiazole in the solid [11] indicate that the thione-thiol form is the most stable tautomer.…”

Ultrasensitive and selective spectrofluorimetric determination of Hg(II) using a dimercaptothiadiazole fluorophore

“…1a. It shows a predominant band at 330 nm with a shoulder band at 257 nm, corresponding to dithiol and thiolate forms of DMT, respectively [27,28]. of Hg(II).…”

“…2,5-Dimercpato-1,3,4-thiadiazole (DMT) is an interesting ligand having five donor atoms in protonated and deprotonated forms and it has been extensively used as a chelating ligand [27][28][29]. In the solid state, DMT exists as a thiolate tautomer, while in solution it exists as dithiol, thiolate and dithione forms and solvent dependent equilibrium obtained between all forms (Scheme 1).…”

Cathodic Stripping Voltammetry of 2-Mercapto-5-Methyl-1,3,4-Thiadiazol and 2,5-Dimercapto-1,3,4-Thiadiazol at a Controlled-Growth Mercury Drop Electrode

“…2,5-Dimercapto-1,3,4-thiadiazol (DMTD) is a compound well known for its application as a fungicide or brightener for copper electrodeposition [1]. It is also used as a metal chelating agent (bismuthiol I) [2], which has been employed in a surprising variety of other applications, e.g., antioxidation of lubrication oils, cancer inhibition, etc. [3].…”