Reduction potentials thiocyanates

Two types of electrode reactions were found in the reduction of thiocyanates. 2-Thiocyanatocacetophenones [119] are reduced in a two-electron reduction to the acetophenone and thiocyanate ion. In most other thiocyanates the reduction results in the loss of a cyanide ion the half-wave potential is nearly independent of pH. Macroscale reductions at a mercury cathode yielded [149] the mercaptan. 

Substitution of 0x0 by sulfido ligands leads to more positive reduction potentials, E(Mo "/Mo ) for MoXY(ONC5Hio)2 (XY = O2, OS, S2) being -2.50, -1.94 and -1.59 V (vs. FcVFc in DMF), respectively. Cyanolysis of MoOS(ONC5Hio)2 produces thiocyanate (65-80%) cf. cyanolysis of XnO) but is complicated by the production of free HNC5H10 and HONC5H10 upon reaction. ... 

White phosphorus reduction. White phosphorus, and indeed sodium or potassium thiocyanate, are fast reducers. Chloroauric acid is boiled under reflux with white phosphorus (6) dissolved in diethylether. Boiling is continued until the solution turns from a brownish shade to red—this usually takes about 5 mm. This method produces gold particles m the smaller size range (2-12 nm) Accurate production of the particle size range is not easy, and, since the procedure is potentially highly dangerous, it is not commonly used... 

Small amounts of the N-oxide of 8 accompanied the formation of o,o -dinitrodiphenylethane by the reaction of o-nitrotoluene with potassium rert-butoxide [73AC(P)329 75MI4]. Formation of 8 and its N-oxide also resulted from the controlled-potential electrolysis of o-nitrobenzyl thiocyanate, a reaction proceeding by dimerization of the initially formed onitrobenzyl radicals followed by simultaneous or subsequent reductive coupling of the nitro groups. In strongly acidic medium, the reaction took a different course (85CCC33). 

The drug must be administered as a controlled continuous infusion, and the patient must be closely observed. Most hypertensive patients respond to an infusion of 0.25-1.5 flg/kg/min. Higher infusion rates are needed to produce controlled hypotension in normotensive patients under surgical anesthesia. Infusion of nitroprusside at rates >5 flg/kg/min over a prolonged period can cause cyanide and/or thiocyanate poisoning. Patients receiving other antihypertensive medications usually require less nitroprusside to lower blood pressure. If infusion rates of 10 pg/kg/min do not produce adequate reduction of blood pressure within 10 minutes, the rate of administration of nitroprusside should be reduced to minimize potential toxicity. 

The most vivid example of another group of electrochemical oscillators might be the Hg In(III), SCN" system involving potential-dependent catalysis by thiocyanate of In(III) reduction. This system was investigated rather extensively [108-112]. According to the mechanism proposed in [109], the formation of adsorbed InfSCN) complexes is the rate-determining step followed by fast electroreduction of this species. As in the case of aforementioned systems, the... 

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