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Back Cover: Synthesis of Soluble, Alkyne‐Substituted Trideca‐ and Hexadeca‐Starphenes (Chem. Eur. J. 40/2014)
Author(s) -
Rüdiger Elias C.,
Porz Michael,
Schaffroth Manuel,
Rominger Frank,
Bunz Uwe H. F.
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201490169
Subject(s) - alkyne , tetracene , chemistry , orange (colour) , ring (chemistry) , medicinal chemistry , stereochemistry , polymer chemistry , catalysis , crystallography , photochemistry , organic chemistry , anthracene , food science
Starphenes were obtained by the Ni‐catalyzed trimerization (Yamamoto reaction) of suitable ortho ‐dibromotetracene and ortho ‐dibromopentacenes. The starphenes are highly soluble due to the attached triisopropylsilyl (TIPS)‐ethynyl groups. These bulky groups also distort the molecular structure of the starphenes. The red starphene in the foreground is tetracene based, whereas the orange star is dibromopentacene based, representing three hexacenes, sharing one central ring. The starphenes are surprisingly stable and showed weak absorption bands in the visible spectra. For more information, see the Communication by U. H. F. Bunz et al. on page ff. 12725.