Tribromide Salts of the Organic Donor Tetra(methylthio)tetrathiafulvalene, [TTM-TTF]+(Br3~) and [TTIYl-TTF]2+(Br,
نویسنده
چکیده
The 1:1 and 1:2 phases (TTM -TTF)Br, and (TTM -TTF)(Br3)2, TTM-TTF = tetra(methylthio)tetrathiafulvalene, C UIH 12S8, have been crystallized by diffusion of bromine vapour into solutions of the donor. The 1:1 salt is monoclinic, P 2xln, a = 7 .587(2), b = 11.424(3), c = 23.145(8) Ä , ß = 95.80(3)°, V = 1997 Ä 3, Z = 4, Mr = 628.45, dc = 2.09 g e m '3, final Rw = 0.028 for 912 reflections. The 1:2 salt is m onoclinic, C2/m, a = 11.510(3), b — 17.039(4), c = 9.770(3), ß = 141.62(1)°, V = 1190 Ä 3, Z = 2, Mr = 868.16, dc = 2.42 g e m '3, final Rw = 0.029 for 899 reflections. Diadic stacks of the m onopositive donor cations are found in the 1:1 salt, whereas the dipositive cations in the 1:2 salt form sheets via short intermolecular S---S contacts. A relation between bond lengths and charge is indicated.
منابع مشابه
A TTF Derivative Acting as a Chelate Ligand: Structure of |i-[Tetra(niethyIthio)tetrathiafuIvaleneJdi[diodoniercury(II)], (TTM-TTF) (Hgl2)2, and the Structure of a Second Modification of Free TTM-TTF
(TTM -TTF)(HgI2)2 [TTM-TTF = tetra(methylthio)tetrathiafulvalene. C 1(IH 12S8] was obtained as one of the products of the reaction of TTM-TTF with H gl,. It is triclinic, P I , a = 7.667(1), b = 8 .308(2), c = 11.608(3) Ä , a = 81.42(2), ß = 75.15(2), y = 67.06(2)°, V = 657.2 Ä 3, Z = 1, Mr = 1297.53, dc = 3.28 g e m -3, final RK = 0.035 for 2755 reflections and 116 parameters. The donor acts a...
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