Showing papers by "Fritz Feigl published in 1959"
TL;DR: The pyrolytic splitting off of thiocyanic acid is not specific for cyanides because this product also results with compounds which have a C=N group as mentioned in this paper.
Abstract: Studies of the pyrolytic behavior of cyanides (nitriles) have shown:
1.
When aromatic and aliphatic cyanides (nitriles) are pyrolysed in the presence of sulfur, they split off thiocyanic acid.
2.
Aliphatic cyanides yield hydrogen cyanide when the dry mixture with calcium oxide or carbonate is heated to 150°.
3.
The detection of the thiocyanic acid or hydrogen cyanide produced in 1. and 2. forms the basis of new tests for cyanides.
4.
The pyrolytic splitting off of thiocyanic acid is not specific for cyanides because this product also results with compounds which have a C=N group.
5.
The test for aliphatic cyanides is specific.
9 citations
TL;DR: A specific spot test for N-cyano compounds can be based on the fact that when they are treated with zinc and a mineral acid, hydrocyanic acid is split off as mentioned in this paper.
Abstract: A specific spot test for N-cyano compounds can be based on the fact that when they are treated with zinc and a mineral acid, hydrocyanic acid is split off. This volatile acid gives a blue color with filter paper moistened with copper acetate and benzidineacetate. The limits of identification are within the bounds of spot test analysis.
5 citations
5 citations