ISSN:
0009-2940
Schlagwort(e):
Poly[1,2-phenylene(2,1-ethynediyl)], phenyl-capped
;
Substituted 1,2-Diethynylbenzenes, substituted
;
π systems, conjugated extended
;
Oligo(acenes)
;
Helical structures
;
Chemistry
;
Inorganic Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
A new set of conjugated oligomers C6H5C…C-(1,2-C6H4C…C)n - C6H5 (10; n = 3-7) comprised of acetylene and phenyl units linked together at the 1,2 positions of the aromatic ring is introduced. The facile synthesis of these compounds is achieved through the Pd-mediated coupling reaction of diiodo- and dibromobenzene with the appropriate ethynyl component. Spectroscopic data of the new compounds are discussed in light of electronic conjugation of the extended π system. Thermolysis of oligomers 10 indicates that rearrangement of the triple bonds occurs to form higher conjugated oligo(acenes). The topology of two members (10; n = 2, 3) is confirmed by X-ray analysis and reveals a propensity for intramolecular π-stacking of the phenyl rings leading to a helical arrangement.
Zusätzliches Material:
3 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/cber.19931260123
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