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Mixed‐Valence Biferrocenium Salts of X n –TCNQ (X = F, Cl; n = 1, 2): Correlation between Molecular Structures and Assembled Structures
Author(s) -
Mochida Tomoyuki,
Funasako Yusuke,
Yamazaki Shizue,
Mori Hatsumi
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201400093
Subject(s) - chemistry , acceptor , valence (chemistry) , crystallography , tetracyanoquinodimethane , crystal structure , ion , inorganic chemistry , molecule , organic chemistry , physics , condensed matter physics
Abstract Charge‐transfer salts composed of biferrocene derivatives and X n –TCNQ (X = F, Cl; n = 1, 2; TCNQ = tetracyanoquinodimethane) were prepared and crystallographically characterized. All nine salts exhibited a 1:2 donor/acceptor (D/A) ratio consisting of mixed‐valence biferrocenium cations and anions with acceptor dimers. The packing patterns were correlated to the donor substituents. On the basis of the π–π interactions of the cations, the observed structures were classified into three categories: segregated‐stack structures for the biferrocenium and dibromo‐biferrocenium salts, mixed‐stack structures [ ··· (DA 2 ) n ··· ] for the diiodo‐biferrocenium salts, and intermediate structures [ ··· (DDA 2 A 2 ) n ··· ] for the bromo‐biferrocenium salts.