Preparation of new π-conjugated polypyrroles by organometallic polycondensations.: Synthesis of N-BOC (t-butoxycarbonyl) and N-phenylethynyl polymers, thermal deprotection of the BOC group, and packing structure of the N-phenylethynyl polymer

New pi-conjugated polypyrroles such as poly(3-heptyl-N-(t-butoxycarbonyl)pyrrole-2,5-diyl), PPr(3-Hep; N-BOC), and poly(N-(phenylethynyl)pyrrole-2,5-diyl-alt-thiophene-2,5-diyl), Copoly-2, were prepared by organometallic polycondensations using the corresponding 2.5-dihalopyrroles as the starting materials. Deprotection of the BOC group of PPr(3-Hep; N-BOC) proceeded at 185 degrees C to give poly (3-heptylpyrrole). XRD (X-ray diffraction) data of Copoly-2 indicated that Copoly-2 assumed a stacked structure in the solid. (c) 2005 Wiley Periodicals, Inc.