Dielectric mercury compounds

Samples of 1 (200 mg) were sealed in evacuated Pyrex ampoules (inner diameter 4 mm) and immersed in a 500-mL Pyrex beaker filled with ice and water in such a way that no ice blocked the laser beam. The beam of an excimer laser (Lambda Physics, EMC 201 XeCl 17 ns pulses 50 Hz repetition rate 3 h X = 308 nm) was positioned vertically using two dielectric mirrors and focused to the desired intensity by a quartz-lens with a focal length of 20 cm. For low intensity irradiations, the ampoules were placed in front of a mercury arc at a distance of 5 cm. The product ratio depended on the light intensity. The compounds 1, 2, 3 and 4 were separated by gas chromatography or HPLC on RP18 and spectroscopically characterized after 93-97% conversion to 3 and 4. 

ARh 12 442, ARi) 12-591, AA- 0 873, AA,3-a 0 530. Molecular heat of combustion at constant volume, 733,600 calories. Investigations on the dielectric constant have been carried out by Walden, and the complex CgHgHg- was isolated by Krause in a similar manner to the corresponding methyl body. Whilst mercury dimethyl possesses much the same absorptive power as mercuric chloride, the diethyl compound shows much greater absoiq tion. ... 

Like DMF, NMP is of limited value for oxidations but useful for cathodic reactions. Its dielectric constant is 32, and it is able to dissolve the same types of salts and organic compounds as DMF. NMP has a liquid range of from —24 to 205 C the useful potential range is approximately the same as for DMF. Mercury in contact with its oxidation... 

Due to their good donor properties formamide and acetamide dissolve many ionic compounds7 94,96 g ch as alkali halides, various salts of copper, zinc, cadmium, aluminium, tin, lead, nickel, mercury and other acceptor compounds, such as FeCls or SbCls. The high dielectric constants allow considerable dissociation of the compounds ionized in the solutions. 

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