A new tetrathiafulvalene-diamide cation salt with [Cu2Br4](2-)anions

作者：Lu Wen; Zhu Qin Yu; Zhang Yong; Lin Xiao Min; Dai Jie^*

来源：Acta Crystallographica Section C-Crystal Structure Communications, 2007, 63: M496-M498.

DOI：10.1107/S0108270107042035

The title salt, bis[2,3-bis(aminocarbonyl)-8,9-bis(methylsulfanyl) tetrathiafulvalenium] di-mu-bromido-bis[bromido-copper(II)], (C10H10N2O2S6)(2)[Cu2Br4], contains 2,3-bis( aminocarbonyl)-8,9-bis(methylsulfanyl) tetrathiafulvalenium radical cations, [DMT-TTF(CONH2)(2)](center dot+), and [Cu2Br4](2-) anions. The cations are associated across centres of inversion in a head-to-tail fashion via short face-to-face S center dot center dot center dot S stacking (TTF moiety). These dimers are further assembled into a one-dimensional chain structure via interdimer double S center dot center dot center dot S contacts involving the methylsulfanyl groups. The one-dimensional chains give rise to a two-dimensional structure through intermolecular double N-H center dot center dot center dot O hydrogen bonds involving the amide group. The [Cu2Br4](2-) anions, which straddle centres of inversion, are located between the cation layers. Electron paramagnetic resonance measurements show a radical signal, indicating that the two TTF center dot+ radicals are not completely coupled in the dimer.

• 出版日期2007-11
• 单位苏州大学; 宿州学院