Abstract:Stoichiometric and, in most cases, absolute rates of coupling of a series of m-and p-substituted benzenediazonium ions with 2,3-dihydroxynaphthalene-6-sulfonate ion (1) have been determined (i) at pH 5.6 (when one OH group is partly monoionized) and (ii) a t pH 9.9 (when one OH group is completely ionized and the second slightly so). The rates a t both pH values correlate with the u+ parameter (except for the most reactive ArNg a t p H 9.9) and the contributions of the two reactive forms of the coupler evaluat… Show more
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