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tert ‐Butyl‐End‐Capped Polyynes: Crystallographic Evidence of Reduced Bond‐Length Alternation
Author(s) -
Chalifoux Wesley A.,
McDonald Robert,
Ferguson Michael J.,
Tykwinski Rik R.
Publication year - 2009
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200902760
Subject(s) - alternation (linguistics) , bond length , crystallography , chemistry , materials science , crystal structure , linguistics , philosophy
Cumulene or polyyne? The synthesis and X‐ray crystallographic analysis of a series of polyynes up to 20 C sp atoms in length and end‐capped with tert ‐butyl groups has been achieved. The structural data show a distinct reduction in the bond‐length alternation as a function of the polyyne length, but this trend appears to saturate before a cumulenic‐like structure is achieved.