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We regard these results as indicative of the formation of a series of closely related polymers in moderately concentrated peroxytitanic acid solutions. In the dilute concentration range where Beer's law is obeyed the solutions contain only the peroxytitanic acid monomer, but a t higher concentrations equilibrium mixtures of polymeric species occur, accounting for the gradual transition in the absorption characteristics of the solutions. This view is supported by the observation that increasing peroxytitanic acid concentrations do not produce increased molar absorptivities in any part of the visible or near ultraviolet spectrum, but rather a general decrease in absorption, which is indicative of a stabilization of the electronic system of titanium as polymerization progresses.Acknowledgment.-The spectrophotometric measurements were made in cooperation with Mr. R. T. O'Connor and Mr. Donald Mitcham. SOUTHERN REGIONAL RESEARCH LABORATORY~ AND TULANE UNIVERSITY NEW ORLEANS 19, LOUISIANA DEPARTMENT O F CHEMISTRY ( 5 ) One of the laboratories

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