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Deep‐Colored, Through‐Conjugated Multitriphenylmethylium Ions
Author(s) -
Hellwinkel Dieter,
Stahl Heinz,
Gaa Heinrich Georg
Publication year - 1987
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.198707941
Subject(s) - conjugated system , ion , ether , orange (colour) , colored , chemistry , medicinal chemistry , photochemistry , organic chemistry , materials science , polymer , food science , composite material
The first members 1 and 2 of a series of novel multitritylium ions were obtained by treatment of the trityl ether precursors with very strong acids. The tritylium ions known so far have been yellow to orange, whereas the new compounds are intense red and red‐violet, respectively. In the 1 H‐NMR spectrum, the para protons of the terminal phenyl groups exhibit record screening values of δ = 8.84 and 8.68, respectively.