Other Organometallic Polymers

D run run Yellow powder (partly soluble) H --OeHi3 -OieH33 mesophase ca. 156-280°C 

Analogous cobalticenium-containing polymers (11) are also obtainable by the 

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A174. F. G. A. Stone and W. A. G. Graham, eds., Inorganic Polymers. Academic Press, New York, 1962. 631 pp. There are sections on P, S, B polymers, silicones, and other organometallic polymers. 

There are, however, other classes of inorganic and organometallic polymers that deserve consideration due to their considerable scientific and applicative relevance, such as polysilanes [28-31], polycarbosilanes [32,33],polysilazanes [33],polyborazines [34,35],polythiazenes [36], and, as an example,polymetal-locenylsilanes [37]. 

One previous synthesis of ferrocene-containing condensation polymers via interfacial methods at room temperature has been reported by Knobloch and Rauscher, who formed low molecular weight polyamides and polyesters by reacting l,l -bis(chloro-formyl)ferrocene with various diamines and diols. Further, Carraher and co-workers have utilized interfacial techniques in the formation of other types of organometallic polymers. 

A wide range of reactions have been used, but only a few are illustrated here. Carboxylate and sulfide groups have been used to obtain organometallic polymers (Eqs. 2-235 and 2-236). These types of reactions have been used to synthesize organometallic polymers of a wide variety of other metals (e.g., Zr, Hf, Si, Ge, Pb, As, Sb, Bi, Mn, B, Se). The polymer obtained... 

An alternate synthetic approach to organometallic polymers is to perform reactions where the metal atom is not the reaction site. An example is a polyesterification between an organometallic monomer containing two carboxyl groups and a diol (Eq. 2-238). Reaction of the diacid with a diamine would yield an organometallic polymer via polyamidation. A wide range of other reactions covered in this chapter can be used to synthesize organometallic polymers. 

Zeldin, M. Wynne, K. J. Allcock, H. R. Inorganic and Organometallic Polymers. Macromolecules Containing Silicon, Phosphorous, and Other Inorganic Elements. American Chemical Society Washington, DC, 1988 Vol. 360. 

Other examples of Pd-Pd bond-containing organometallic polymers were synthesized and described.40 Their structures are different in that the diphosphine acts as a chelating ligand instead of a bridging M2-support (Fig. 18). 

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