Metallic organic conductor with 1:1 composition including magnetic anion

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Organic donor TTM-TTP forms 1:1 composition salts with MX 4 (M = Fe, Ga; X = Cl, Br), which have dimerized one-dimensional columns and are insulators even at room temperature. On the Contrary, (TTM-TTP)FeBr 2 Cl 2 shows high electrical conductivity of about 1000 Scm -1 at room temperature and metallic behaviour down to 160 K. This salt has uniform one-dimensional donor columns. This is the first 1:1 composition organic metal with magnetic anion. The FeX 4 - salts exhibit weak magnetic interactions between the anions; the Weiss temperatures are less than 2.6 K.

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