ORIGIN OF THE COLOR OF SINGLE CRYSTALS OF CERTAIN SQUARE PLANAR COMPLEXES.
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Date
1966
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Ohio State University
Abstract
The crystals of several families of square-planar complexes possess colors that are unusual in the sense that they do not arise from a simple superposition of the absorptions of the component molecules or ions. In this paper the origin of the colors in two such groups of compounds, the nickel glyoximates and the Magnus'-type salts, will be discussed. In each instance polarized single-crystal spectra that show the relationship between the crystal and molecular absorptions and demonstrate the essentially perturbed single-molecule nature of the crystal transitions will be presented. Although the visible absorption responsible for the color is associated with fundamentally different types of transitions in the two classes of compounds, it appears that closely related perturbations may in fact be responsible for the spectral changes observed on going from solution to single crystal in both series. The relationship between this work and the more general problem of the electronic structure of square-planar complexes as isolated entities will be discussed.
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Partial support provided by the National Science Foundation.
Author Institution: Sterling Chemistry Laboratory, Yale University
Author Institution: Sterling Chemistry Laboratory, Yale University