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Expanded Radialenes: A Novel Class of Cross‐Conjugated Macrocycles
Author(s) -
Boldi Armen M.,
Diederich François
Publication year - 1994
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199404681
Subject(s) - conjugated system , delocalized electron , electron delocalization , molecule , nanometre , carbon fibers , class (philosophy) , stereochemistry , chemistry , crystallography , materials science , organic chemistry , polymer , computer science , composite number , artificial intelligence , composite material
Large cores composed exclusively of carbon , substituents only on the periphery, and nanometer‐scale dimensions—these are the characteristics of the title compounds 1 ( n = 1; C 40 + 8Si i Pr 3 ), 2 ( n = 2; C 50 + 10Si i Pr 3 ), and 3 ( n = 3; C 60 + 12Si i Pr 3 ). The π‐electron delocalization in these molecules is limited to the longest linearly conjugated fragment (TIPS = triisopropylsilyl).