Tetrakis methyltelluro

The following compounds are the most popular donors for organic metals (see Scheme 8.9) TTF, tetraselenafulvalene (TSeF), tetrathiatetracene (TTT), tetraselenatetracene (TSeT), tetra-methyl tetraselenafulvalene (TMeTSeF), bis(thiadimethylene) tetrathiafulvalene (BTDM-TTF), bis(ethylenedithia) tetrathiafulvalene (BEDT TTF or ET), tetrakis(methyltelluro) tetrathiafulvalene (TTeCj-TTF), tetramethylbis(ethylenedithia) tetrathiafulvalene (TMET), 2,2 -(2,6-naphthalenediy-lydene) bis(l,3-dithiole) (NBDT). All the abbreviations are those used in the current literature. 

Inokuchi H, Imaeda K, Enoki T, Mori T, Maruyama Y, Saito G, Okada N, Yamochi H, Seki K, Higuchi Y, Yasuoka N (1987) Tetrakis(methyltelluro)tetrathiafulvalene (TTeCjTTF), a high-mobility organic semiconductor. Nature 329 39 0... 

Reaction of methanetellurol with lithium aluminum hydride in diethyl ether caused liberation of hydrogen and formation of lithium tetrakis[methyltelluro]aluminate. This compound was not isolated but reacted with silyl or germyl halides to give silyl or germyl methyl tellurium derivatives4. 

Lithium tetrakis[methyltelluro]aluminate, prepared from methanetellurol and lithium aluminum hydride, reacted with silyl, germyl, and stannyl halides at low temperatures to produce, for instance, methyl silyl tellurium derivatives1. 

Let us mention the case of tetrakis(methyltelluro)TTF [76]. This material is (already) in the quasi-ionic phase at 300 K and it undergoes dimerization below 240 K. Some measured values of the threshold field Eth above which jumps of current density occur are = 300 V/cm at 200 K, = 600 V/cm at 180 K, and = 1100 V/cm at 160 K. Crystals have typical dimensions of 0.8 x 0.8 x 0.2 mm3. This material was also chosen to build a prototype bistable device which utilized the switching effect [76]. 

Figure 15 Time-dependent characteristics of a bistable device utilizing a crystal of the organic mixed-chain charge-transfer complex tetrakis(methyltelluro)TTF cooled at 155 K. (From Ref. 76.)...

Tetrakis(methyltelluro)tetrathiafulvalene is a single-component organic semiconductor [87N(L)(329)39], and other related long-chain derivatives have been studied [92PS(67)367], mainly in connection with the so-called fastener effect (87PAC999). 

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