Thesis (M.A.)--Boston UniversityOver the past several years various workers have accumulated evidence for the existence of polynuclear complexes of a number of metal ions. In this connection it has been established that iron(III) forms polynuclear species with a variety of common complexing agents. In the present work an investigation was carried out on systems containing iron(III) and selected carboxylic acids. An attempt was made to classify the systems according to whether or not they formed polynuclear species. For some systems it was established under what conditions polynuclear species are present and under what conditions they are not present. [TRUNCATED