New Compounds. Derivatives of Di-(<i>p</i>-chlorophenyl)-acetic Acid

Grummitt, Oliver; Marsh, Dean

doi:10.1021/ja01180a650

Cited by 4 publications

(1 citation statement)

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“…lb) Di-(p-chlorophenyl) acetic acid (DDA) was prepared from 2,2 bis(/>-chlorophenyl) 1,1,1-trichlorethane (DDT) by the method of Grummit, Buck and Egan [9], The anhydride of DDA was prepared from DDA by a modification of the method of Grummit and Marsh [10]. A mixture of 40 g of DDA and 31.4 g of redistilled acetic anhydride (BP 139-140°C) was refluxed gently for 2 h. The acetic acid and remaining acetic anhydride were distilled off under reduced pressure (0.5 mm Hg) at a temperature below 40° C. Another 30 g of acetic anhydride was added and refluxing continued for two additional hours.…”

Section: Methodsmentioning

confidence: 99%

Antibodies to Two Common Pesticides, DDT and Malathion

Centeno

Johnson

Sehon

1970

Int Arch Allergy Immunol

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Section: Methodsmentioning

confidence: 99%

Antibodies to Two Common Pesticides, DDT and Malathion

Centeno

Johnson

Sehon

1970

Int Arch Allergy Immunol

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Cyanoethylation, Decyanoethylation, and Transcyanoethylation

Butskus¹

1961

Russ. Chem. Rev.

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In the long gap between the boiling point of sulphur (444O.60 c.) and the freezing point of gold (1063" c.) there is no fixed point which can conveniently be used for the routine calibration of thermocouples in terms of the International Temperature Scale. The boiling point of selenium (about 690" c.) is suggested as a possible fixed point in this region, and as a first step towards enabling it to be used for this purpose the precise determination of its value has been undertaken.The determination was carried out in a silica boiling tube similar to that normally used at the sulphur point, having a re-entrant tube fitted with a radiation shield. By connecting the apparatus to a reservoir the variation of the boiling point with pressure over the range 700 to 800 mm. of mercury was also determined. The measurements were made by means of three standard platinum vs. platinum-rhodium thermocouples calibrated at the freezing points of gold, silver and antimony. Samples of selenium from two sources, and two types of radiation shield, were employed and gave the same result.The value found for the boiling point in terms of the International Temperature Scale was 6848&0°*1 C. at normal atmospheric pressure, with a variation of 1O.08 c. per cm. of mercury.

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