Tetrachloroferrate (III) Salts of BDH-TTP [2,5-Bis(1,3-dithiolan-2-ylidene)-1,3,4,6-tetrathiapentalene] and BDA-TTP [2,5-Bis(1,3-dithian-2-ylidene)-1,3,4,6-tetrathiapentalene]: Crystal Structures and Physical Properties

New Organic Metals Based on BDH‐TTP Radical Cation Salts with the Photochromic Nitroprusside Anion [FeNO(CN)5]2–

“…Superconductivity in low-dimensional organic conductors is known to be very sensitive to disorder. [19] The band structures and Fermi surfaces for 1, 2, k-(BDH-TTP) 2 PF 6 , [2] and k-(BDH-TTP) 2 FeCl 4 [3] have been calculated.…”

“…The crystal structures of the ªmetallicº salts (BDH-TTP) 2 X (X = PF 6 , FeCl 4 ) are characterized by the presence of k-type BDH-TTP layers alternating with anion sheets. [2,3] The main structural differences between the BDH-TTP and BEDT-TTF molecules are the following: i) BDH-TTP is a more planar molecule than BEDT-TTF and ii) the terminal ethylene groups of BDH-TTP are part of rigid five-membered rings, while those of BEDT-TTF are part of more flexible six-membered rings which allow the BEDT-TTF molecule to be in different conformations. To enhance the structural flexibility of BDH-TTP, its dithiane analog, namely, 2,5-bis(1,3-dithian-2-ylidene)-1,3,4,6-tetrathiapentalene (BDA-TTP), was synthesized in 2001 and radical cation salts based on this donor with anions of different geometries were prepared.…”

“…a) Projection of the crystal structure of (BDH-TTP)2 [NP](3) along the a-direction. b) Side view of the radical cation stack.FULL PAPERspectively, in agreement with the structural analysis.…”

First radical cation salts of 2,5-bis(1,3-dithian-2-ylidene)-1,3,4,6-tetrathiapentalene (BDA-TTP) with copper(II) metal complex anions: β-(BDA-TTP)4Cu2Cl6 and (BDA-TTP)2CuCl4

“…Crystals of 4 are ambient pressure superconductors, 7,8 whereas the metal-dielectric transition is observed at 120 K for crys tals of 5. 21,22,27 The transition temperature decreases with increasing pressure. At a pressure higher than ~4.5 kbar, the superconducting transition occurs in magnetic (FeCl 4 -) and nonmagnetic (GaCl 4 -) compounds.…”

Magnetic and Transport Properties of π–d System κ-(BDH-TTP)2FeCl4

“…ethylenedioxy-tetrathiafulvalenoquinone-1,3dithiolemethide), 16) (EDO-TTFVODS) 2 FeBr 4 (EDO-TTFVODS: ethylenedioxy-tetrathiafulvalenoquinone-1,3diselenolemethide), 17) (EDT-DSDTFVSDS) 2 FeBr 4 (EDT-DSDTFVSDS: ethylenedithio-diselenadithiafulvalenothioquinone-1,3-diselenolemethide), 18) (EDT-DSDTFVO) 2 FeX 4 (X: Br, Cl) (EDT-DSDTFVO: ethylenedithio-diselenadithiafulvalenoquinone-1,3-dithiolemethide), 19) 00 -(EDO-TTFVODS) 2 FeBr 4 (SCE) 0:15 , 20) -(BDA-TTP) 2 FeCl 4 [BDA-TTP: 2,5-bis(1,3-dithian-2-ylidene)-1,3,4,6-tetrathiapentalene], 21) and -(BDH-TTP) 2 FeX 4 (X: Br, Cl) [BDH-TTP: 2,5-bis(1,3-dithiolan-2-ylidene)-1,3,4,6-tetrathiapentalene] 21,22) have been successfully synthesized so far.…”