Dithizonates of gold and palladium.
Contrary to some previous reports, it has been found that gold reacts with dithizone in the ratio 1:1 forming a red-brown complex, and in the ratio 2:1 forming a yellow complex, both extractable into chloroform. The proportion of these two complexes in the organic extract depends critically on several factors. Therefore, the use of dithizone as a spectrophotometric reagent and especially as an extractive titrant for gold cannot be recommended. Previous reports on the composition and colour of the dithizonates of palladium are confirmed, except that PdDz is soluble in carbon tetrachloride and in chloroform.
Beardsley
D A
DA
Department of Chemistry College of Advanced Technology Birmingham, 4, England.
Briscoe
G B
GB
Růzicka
J
J
Williams
M
M