Abstract
The acetylenic and cumulenic forms of carbyne (α and β-carbyne, respectively) have been obtained simultaneously by oxidative coupling of dicopper acetylide under Glaser conditions. Carbynes having copper atoms, or phenyl groups, at the ends of the chains were successfully synthesized. At room temperature these end-groups confer an indefinite stability to this allotrope, whereas at high temperature in vacuo β-carbyne is transformed to α-carbyne, which is thermodynamically more stable. Carbyne chemical structure was studied and confirmed by FTIR spectroscopy, electronic spectroscopy, and X-ray diffraction. The chemical reactivity of carbyne was checked versus chlorine in the presence of UV light and dinitrogen tetroxide. The specific conductivity of undoped carbyne obtained by Glaser synthesis was found to be in the range 2·11×10-6–1·41×10-6Scm-1, just one order of magnitude lower than the conductivity of trans-polyacetylene. Polyeneyne or ‘Straus carbyne’ was synthesized via the Straus reaction and its structure was studied by FTIR and electronic spectroscopy. ©1997 SCI
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
