Oxidizing agents MnOJ-. 216

Ag" (precipitate of AgSCN) and (red colouration). Photographic sulphur sensitizers. With oxidizing agents (MnOj, Br ) give thiocyanogen, (SCN)2, which polymerizes above O C. 

Manganates V f), [MnOJ", permanganates. Dark purple tetrahedral anion (electrolyte oxidation of [Mn04]. Powerful oxidizing agent... 

Arsenic(III) oxide (AS2O3) is available in pure form and is a useful (and poisonous) primary standard for many oxidizing agents, such as Mn04. AS2O3 is first dissolved in base and titrated with MnOJ in acidic solution. A small amount of iodide (F) or iodate (10J) is used to catalyze the reaction between H3ASO3 and MnO. The reactions are... 

A series of meta and para substituted 3- and 5-benzyloxy derivatives of 2-formylpyridine thiosemicarbazone has been synthesized both to explore and to utilize a hypothetical hydrophobic binding zone adjacent to the major inhibitor binding site of the target enzyme, ribonucleoside diphosphate reductase [20]. These agents were synthesized by condensing a nitrobenzyl bromide (19) with 3-or 5-hydroxy-2-hydroxymethylpyridine (18), followed by oxidation with MnOj... 

A few reports had been published using a-hydioxyketone for in situ generation of the 1,2-diones by an oxidizing agent like MnOj on acidic alumina [125] under microwave heating (Scheme 2.23). 

Alkaline Battery The ubiquitous alkaline battery has a zinc anode case that houses a mixture of MnOj (the oxidizing agent) and an alkaline paste of KOH and water. The cathode is an inactive graphite rod (Figure 21.14). The half-reactions are... 

MnOj + 2 NO + 6 H, assign oxidation numbers and use them to identify the element oxidized, the element reduced, the oxidizing agent, and the reducing agent. 

---