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Tetrakis(trialkylsilylethynyl)butatriene and 1,1,4,4‐Tetrakis(trialkylsilylethynyl)‐1,3‐butadiene: Novel Cross‐Conjugated Chromophores
Author(s) -
van Loon JanDirk,
Seiler Paul,
Diederich François
Publication year - 1993
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.199311871
Subject(s) - cumulene , conjugated system , double bond , chromophore , 1,3 butadiene , chemistry , rhodium , photochemistry , polymer chemistry , molecule , organic chemistry , catalysis , polymer
The first tetraethynyl[3]cumulene derivatives 2 have been prepared from 1 and structurally characterized by X‐ray analysis. The central butatiene double bond is the most reactive site in 2 and can be selectively reduced by triphenylphosphane in the presence of water to form the strongly fluorescing 1,1,4,4‐tetraethynyl‐1,3‐butadiene. Rhodium( I ) also undergoes complexation at the central cumulene double bond. R = SiMe 3 , Si i Pr 3 .