Conjugated polymers organometallic structures

In going from benzene to 3-carotene (the second structure), the Y value increases by more than three orders of magnitude showing the importance of increase in the effective conjugation length. The third structure exhibits N-phenyl substitution in the benzimidazole type structures to introduce a two dimensional conjugation. The last structure, an organometallic polymer, has also been measured in the solution phase. Because of the resonance condition encountered, the Y value is.complex. 

Organometallic polycondensation processes based on basic organometallic chemistry [1] have contributed to the preparation of 7r-conjugated polymers and represent the first preparation of this kind (e.g. PTh and PRTh). The 7r-conJugated polymers prepared by organometallic polycondensation have a well-characterized structure and have contributed to our understanding of basic chemical and physical properties as well as elucidation of the structure of the 7i-conjugated polymers. In addition, they are useful materials for electric and optical devices and are expected to be invaluable in future applications. 

Since organometallic polycondensation attains a n-conjugated poly(arylene) system with well-defined bonding between the recurring arylene units, the polymers are considered to assume interesting characteristics such as rigid linear and helical structures. 

The thermal reaction of cis or trans 1,4-poly(butadiene) with iron carbonyls results in geometrical isomerization of the alkenyl moieties and formation of polymers containing conjugated diene) iron tricarbonyl units. In the course of our continuing studies of the formation of stable colloidal iron dispersions by thermal decomposition of metal carbonyls in the presence of functional polymers, some aspects of this work have been repeated. Our objective was to isolate the soluble organometallic polymer which was intermediate to particle nucleation and independently examine the intramolecular condensation of metal atoms to yield metal clusters and metal particles. In this paper, the structure of the intermediate obtained on thermolysis of an excess of FeCCO) in a dilute xylene solution of c/5-poly(butadiene) has been described. 

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