Determination of isocyano groups on polymer supports by bromination.
The isocyano content of several cross-linked polymer samples, carrying ca. 0.5-3.0 mmole of isocyanide groups per gram, was determined by reacting the resins with excess of bromine in chloroform, then treating the unreacted bromine with potassium iodide and titrating the liberated iodine with thiosulphate. The method is not suitable for titration of soluble isocyanides, but for the determination of insoluble macromolecular isocyanides is more satisfactory than the thiocyanic acid method.
Arshady
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Organisch-Chemisches Institut, der Technischen Universität München, 8046 Garching, Lichtenbergstr. 4, BRD.
Ugi
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