DOI: 10.1039/A809430F
(Paper)
Reference Section for: J. Chem. Res. (S), 1999, 196-197
Radical Ion Salts and Complexes, Part XVII. TCNQ Salts of 1,4-Dimethylpyridine and 2,3-Bis(1-methyl-4-pyridinio)butane
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Timothy J. Houghton and Stephen C. Wallwork
Abstract
X-Ray structure determination of the complex salts [MeNC5H4Me]+[TCNQ2]– [1,4–dimethylpyridinium 2(7,7,8,8-tetracyanoquinodimethane) (1–); I] and [Me(NC5H4)(Me)CH–CH(Me)(C5H4N)Me]2+[TCNQ4]2– [meso-2,3- bis(N-methyl-4-pyridyl)butane(2+) 4(7,7,8,8-tetracyanoquinodimethane) (2–); II], where TCNQ=(CN)2C(C6H4)C(CN)2, shows that, although in both salts the TCNQ moieties are stacked in columns, lateral shifts break these columns into diads for I and tetrads for II causing their electrical conductivities to be only moderate (σ=2–4×10–3 ohm–1 cm–1).
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