Catalytic prewaves of cobalt(II) in presence of dimethyldithiocarbamate

✍ Scribed by J. Gálvez; D. Marín; T. Fuente; M. Sarabia

• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 384 KB
• Volume: 27
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(82)80144-8

✦ Synopsis

Two well-defined prewaves of cobalt(L1) in the presence of dimethyldithiocarbamate (Me,DTCJ in a medium containing ammonia (borax-NH&l and N&OH-NH4CI buffer) are observed. The effect of gelatine, Me,DTC, cobalt(H), ammonium hydroxide and ammonium chloride concentration, mercury reservoir heieht. buffer caoacitv. OH and temDerature on the orewaves are described. In addition. the characteristics df the c&&&e and clectkapiiiary curved are shown. This allows to propose a mechanism where the cobalt(H) prewaves are produced by cobalt(H) complexes with Me,DTC. In these complexes, the cobalt(H) and MeiDTC are in the relationship 1: 1 and 1: 2 for the first and second prewave respectively. A value of the rate constant for the formation of the first prewave catalytic complex of 6.0 x lo6 1 rnol-'~-~ has been found at 20 "C.