COORDINATION POLYMERS WITH INORGANIC BACKBONES FORMED BY DOUBLE-BRIDGING OF TETRAHEDRAL ELEMENTS

摘要

In extension of the double-bridging approach to coordination polymers with inorganic backbones that we recently described for octahedral elements1, we wish to report similar polymers in which phosphinate anions double-bridge between tetrahedral elements. Although most of the compositions that we have made are insoluble, or only very slightly soluble in a wide range of solvents, and hence not amenable to the usual techniques of polymer characterization, we have found it possible to determine the molecular weight of one representative of this class and find it to be, indeed, a polymer. On the basis of this finding it is extremely probable that the remaining, insoluble compositions are likewise polymeric. This is very significant in view of the fact that some of these compositions exhibit excellent thermal stability as determined on a thermobalance, making them of great interest as potential thermally stable polymers.