I'm looking for a Wieland's paper on triphenylamine bromination. I've found other papers referencing it like this but I don't find the actual paper.
Does someone know where could I find it? Or whats Wieland's method all about?
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From the reference you supplied the Wieland paper is Chem. Berichte 40 (1907) 4278
The bromination method (3 eq of Bromine in chloroform slowly added to a chloroform soln of triphenylamine) in the experimental section of the reference you supplied appears to be Wieland's method - it is referenced as such