HMTSF crystal structure

Figure 4 Relationship of donor and acceptor stacks in crystal structure of (HMTSF)(TCNQ) showing shared planes of symmetry between donor and acceptor stacks...

FIGURE 6 Crystal structure of HMTSF-TCN2, projected along the b-axis. 

Therefore from 60-200 K the materia 1 s show quite different behaviour which may be related to the larger transverse electron overlap in one direction for HMTSF-TCNQjas deduced from the crystal structure, which shows... 

Hall effect measurements are reported for three single crystals of the charge transfer salt HMTSF-TCNQ in the temperature range 1.4-200 K at ambient pressure and under hydrostatic pressures of approximately 6 Kbars. There is evidence that the high conductivity of this material at low temperatures arises from a small number of electrons with a high mobility and a low degeneracy temperature as suggested by other experiments and a recent band-structure calculation. 

TTF-DETCNQ crystallizes in a triclinic lattice with each acceptor molecule surrounded by four donor molecules and vice versa /lo, 11/. In this respect, TTF-DETCNQ resembles TTF-TNAP /12/ and HMTSF-TCNQ /13/, which also have the "four-nearest-neighbours" structure and not the usual "herring-bone" with, only two nearest neighbours. 

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