Growth mechanisms of polypyrroles

Sargin, PS
Toppare, Levent Kamil
Yurtsever, E
The oligomerization mechanisms of several derivatives of pyrrole have been studied by quantum-mechanical methods. Different growth processes are compared from the point of view of thermodynamic stabilities to gain insight into the branching possibilities. For the simple polypyrrole, polymerization may proceed through either an a or a beta carbon with equal probabilities. When an aldehyde group is attached to the nitrogen, beta positions are definitely favoured owing to strong steric hindrance. For 2-pyrrole carboxaldehyde and 3-pyrrole carboxaldehyde, the most stable forms of the bonding are alternating ones that go through alpha-beta pairs.


Katırcıoğlu, Şenay (Elsevier BV, 1991-09-20)
The structural stability and energetics of Si4 isomers have been investigated by using an empirical tight-binding (ETB) method. It has been found that the most stable Si4 microcluster is an exact tetrahedron with T(d) symmetry.
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A regioselective approach was developed for the synthesis of dipyrrolo-diazepine derivatives. The synthetic route to dipyrrolo-diazepines first involves the synthesis of dipyrromethanes, followed by reaction of propargyl bromide in the presence of NaH to attach one alkyne functionality to the pyrrole nitrogen atom. Intramolecular heterocyclization with NaH in DMF between the alkyne functionality and pyrrole nitrogen atom gave the desired structures in good yields.
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Açıkalın, Serdar; Zora, Metin; Department of Chemistry (2003)
Recently, considerable interest has been devoted to the synthesis of new ferrocene derivatives since properly functionalized ferrocene derivatives could be potential antitumor substances. For this purpose, we have investigated the synthesis of ferrocenyl quinones starting from squaric acid. Thermolysis of ferrocenylsubstituted cyclobutenones, which have been prepared from ferrocenyl cyclobutenediones and alkenyllithiums, affords hydroquinones, which furnish, upon oxidation, ferrocenyl quinones. Ferrocenyl c...
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In this work, the synthesis of stable silver nanoparticles by the bioreduction method was investigated. Aqueous extracts of the manna of hedysarum plant and the soap-root (Acanthe phylum bracteatum) plant were used as reducing and stabilizing agents, respectively. UV-Vis absorption spectroscopy was used to monitor the quantitative formation of silver nanoparticles. The characteristics of the obtained silver nanoparticles were studied using X-ray diffraction analysis (XRD), energy-dispersive spectroscopy (ED...
Citation Formats
P. Sargin, L. K. Toppare, and E. Yurtsever, “Growth mechanisms of polypyrroles,” POLYMER, pp. 1151–1155, 1996, Accessed: 00, 2020. [Online]. Available: