Mercury atom diethyl

Nine hundred and twenty-five milliliters of absolute ethanol (Note 1) is placed in a 2-1. three-necked round-bottomed flask, fitted with a mercury or glycerin-sealed stirrer (Note 2), dropping funnel, and reflux condenser. To this is added 46 g. (2 gram atoms) 2 of freshly cut sodium, a few pieces at a time and at such a rate that the reaction proceeds rapidly but the solvent does not reflux too vigorously. When most of the sodium has dissolved, a calcium chloride drying tube is fitted to the top of the condenser and 320 g. (2 moles) of redistilled diethyl malonate is added from the dropping funnel. Then 205 g. (2 moles) of 3-chlorocyclopentene (p. 42) (Note 3) is added at such a rate that a gentle reflux is maintained. Towards the end of the addition, it is desirable to test the reaction mixture with pH test paper, and the addition should be stopped if the solution becomes acidic. 

T) Diethyl sec.-Butylmalonate.—To 700 cc. of absolute alcohol in a 2-1. three-necked, round-bottomed flask equipped with a long, wide-bore reflux condenservs added 35 g. (1.52 gram atoms) of sodium cut in pieces of suitable size. When all the sodium has reacted, the flask is placed on a steam cone and fitted with a mercury-sealed stirrer, a dropping funnel, and a reflux condenser bearing a calcium chloride tube (Note 1). The flask is heated, and 250 g. (1.56 moles) of diethyl malonate is added in a steady stream with stirring. After the ester addition, 210 g. (1.53 moles) of see.-butyl bromide is added at such... 

In an attempt to explain apparent inconsistencies in the ratio of disproportionation to combination of two ethyl radicals obtained in different investigations, Bradley et al. (13) carried out in 1956 a comparative study of the behavior of ethyl radicals produced by direct photolysis of diethyl mercury and by addition of hydrogen atoms to ethylene. The latter process involved the reactions... 

Many investigators have attempted to isolate mercury derivatives from aceto-acetie ester, but the results have been so varied that no reliance can be placed on any of the early work on this compound. Kharasch and Staveley, however, have obtained definite results by heating mercury salts of substituted acetic acids in vacuo, e.g, di-method and diethyl aceto-acetic acids when dried and heated in vacuo at 90 C. evolve carbon dioxide, and the mercury becomes bound to the carbon atoms which were formerly attached to the carboxyl groups —... 

A. Diethyl a-acetyl-f -ketopimelate. In a 2-1. three-necked flask equipped with a mercury-sealed Hershberg stirrer, a dropping funnel, and a reflux condenser protected with a calcium chloride tube are placed 11.5 g. (0.5 g. atom) of finely powdered sodium (Note 1) and 500 ml. of dry ether. The flask is placed in an ice bath, and 65.0 g. (63.5 ml., 0.5 mole) of freshly distilled ethyl acetoacetate in 150 ml. of dry ether is slowly added from the dropping funnel with stirring (approximate time for addition is 30-40 minutes). The mixture is stirred overnight, then it is... 

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