Tetrakis(methyl isocyanide)palladium(II) tetrakis(7,7,8,8-tetracyano-p-quinodimethane), [Pd(CNMe)4](TCNQ)4.2MeCN: synthesis, structure, and physical properties

Crystal and Molecular Structure of 4-Oxo-6-iodoqwnolinium(OIQn)-2,2'- (2,5-cyclohexadiene-1,4-diylidene)- bispropanedinitrile (TCNQ)

“…4 b is very unusual. There is only one compound of TCNQ known with this type of overlapping mode [8]. the 6,c-plane is shown in Fig.…”

The 1:3 radical salt bis(2,2'-dipyridyl)platinum(II)–7,7,8,8-tetracyanoquinodimethane, [Pt(dipy)2]2+[TCNQ]3 2−

“…Therefore the usual discussion of the distribution of the negative charges based on bond lengths seems unreasonable. A detailed discussion of charge distribution and bond lengths together with a discussion of possible stacking modes of TCNQ is given by Goldberg, Eisenberg, Miller & Epstein (1976) (Ashwell, Eley, Wallwork, Willis, Peachey & Wilkos, 1977), in spite of the completely different cations. Chains of [TCNQ']32-trimers with interplanar distances of 3.15 A within a triad are separated by cations, which also form a sort of chain.…”

“…Depending on the size and the shape of the counter ions, the TCNQ moieties can form infinite equidistant stacks, or stacks composed of dimers, trimers, tetramers and pentamers. Some of the possible TCNQ arrangements have been discussed by Goldberg, Eisenberg, Miller & Epstein (1976). Of special interest are the infinite equidistant stacks, for they can lead to quasi one-dimensional metals, like tetrathiofulvalenium-TCNQ (Phillips, Kistenmacher, Ferraris & Cowan, 1973).…”

Crystal and Molecular Structure of Bis(N,N,N′,N′ -tetramethyl-1,4-diaminobenzeniumyl) [Wurster s Blue Cation]-tetracyanoplatinate(II)-mono-hydrate

“…Since most of the highly conducting transition metal complexes and oil of the conducting organic radical stacks are ionic, the combination of groups (i) and (ii) can readily be achieved by a metathetical reaction between the appropriate ions. Many examples in which the negatively charged 7,7,8,8-tetracyanoquinodimethanide is combined with positively charged transition metal complexes have been known for a long time [8], but none of them could be shown to contain segregated, separately conducting stacks of "inorganic" and "organic" ions [9,10]. On the other hand only a few -partly very recent -examples are known in which the "organic" part of the crystal is positively charged (cationic radicals) and combined with negatively charged planar transition metal units.…”