EDS-TTF

Imakubo T (2004) In Yamada J, Sugimoto T (eds) TTF chemistry fundamentals and applications of tetrathiafulvalenes, halogenated TTFs, chap. 3. Kodansha and Springer, Tokyo... 

Here we discuss interplay between the electron transport of the re-electrons and the magnetism of -electron spins for three salts, (DMET)2FeBr4 [26], (EDTDM)2FeBr4 [23] and (EDS-TTF)2FeBr4 [53]. The crystal structures of these... 

Finally, we discuss the effects of chalcogen (S to Se) substitution. Although in (EDS-TTF)2FeBr4 remarkably close Se---Br contacts exist between donor and anion layers, little magnetic exchange interaction exists between the magnetic anions. The molecular orbital calculation reveals that the contribution of Se 4p orbital to the HOMO of the EDS-TTF molecule is considerably smaller than the contribution of... 

S 3p orbital to the HOMO of DMET or EDTDM molecule. Therefore It J and also I JndI of the EDS-TTF salt becomes negligibly small compared to the DMET or EDTDM salt. It should also be noted that the intermolecular Br—Br distance between FeBr4 anions is almost the same among the EDS-TTF, DMET and EDTDM salts. Therefore this also proves the importance of the n-d interaction in the long-range magnetic ordering of the -electron spins. 

Fig. 4 Illustration of the head-to-tail dyadic association of ortho-dihalo TTFs in the structure of neutral EDS-TSF-I2...

Aoyagi S, Kato K, Ota A, Yamochi H, Saito G, Suematsu H, Sakata M, Takata M (2004) Direct observation of bonding and charge ordering in (EDO-TTF)2PFg. Angew Chem Int Ed 43 3670-3673... 

Shibaeva, R. R, Yagubskii, E. B., Laukhina, E. E. and Laukhin, V. N. (1990). Organic conductors and superconductors based on (BEDT-TTF)-polyiodides In The physics and chemistry of organic superconductors (ed. G. Saito and S. Kagoshima), pp. 342-8. Springer-Verlag, Berlin. [79]... 

TCNQ-) (TCNQ ) characterized recently are presented. Crystallographic study at room temperature has shown a diffuse scattering which indicates the existence of a ED superlattice. From dynamic (EPR) and static magnetism investigations and the existence of a specific heat anomaly an electronic PEIERLS distorsion is postulated. However the semi conductive behaviour of this salt is evidenced by the d.c. conductivity and the thermoelectric power results. A comparison with similar situations in TTF-TCIMQ and mainly in KCP is presented. 

The TTF nucleus in the dumbbell-shaped compound 10 was formed Scheme 5) in the final step of its synthesis by the coupling, in neat triethyl phosphite, of two identical fragments 9, each containing a hydroquinol ring and a 2-oxypropylene-4,5-dithio-2-one-l,3-dithione unit. This synthetic proach yielded the symmetrical dumbbell-shs ed compound 10 in which two hydroquinol rings are located on either side of a central TTF nucleus. ... 

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